670494464640 has 3072 divisors, whose sum is σ = 3323342131200. Its totient is φ = 124694691840.

The previous prime is 670494464621. The next prime is 670494464641. The reversal of 670494464640 is 46464494076.

670494464640 is a `hidden beast` number, since 6 + 70 + 494 + 4 + 6 + 46 + 40 = 666.

It is a super-2 number, since 2×670494464640² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (670494464641) by changing a digit.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 9184855644 + ... + 9184855716.

It is an arithmetic number, because the mean of its divisors is an integer number (1081817100).

Almost surely, 2^670494464640 is an apocalyptic number.

670494464640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670494464640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1661671065600).

670494464640 is an abundant number, since it is smaller than the sum of its proper divisors (2652847666560).

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

670494464640 is a wasteful number, since it uses less digits than its factorization.

670494464640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 54.

The spelling of 670494464640 in words is "six hundred seventy billion, four hundred ninety-four million, four hundred sixty-four thousand, six hundred forty".