664957451592 has 384 divisors, whose sum is σ = 2134993386240. Its totient is φ = 183013447680.

The previous prime is 664957451591. The next prime is 664957451603. The reversal of 664957451592 is 295154759466.

664957451592 is a `hidden beast` number, since 6 + 6 + 4 + 9 + 574 + 5 + 1 + 59 + 2 = 666.

664957451592 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

Its product of digits (81648000) is a multiple of the sum of its prime divisors (1134).

It is not an unprimeable number, because it can be changed into a prime (664957451591) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1164548667 + ... + 1164549237.

It is an arithmetic number, because the mean of its divisors is an integer number (5559878610).

Almost surely, 2^664957451592 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664957451592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1067496693120).

664957451592 is an abundant number, since it is smaller than the sum of its proper divisors (1470035934648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664957451592 is a wasteful number, since it uses less digits than its factorization.

664957451592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141 (or 1134 counting only the distinct ones).

The product of its digits is 81648000, while the sum is 63.

The spelling of 664957451592 in words is "six hundred sixty-four billion, nine hundred fifty-seven million, four hundred fifty-one thousand, five hundred ninety-two".