665449022592 has 256 divisors, whose sum is σ = 2092906992000. Its totient is φ = 210140116992.

The previous prime is 665449022569. The next prime is 665449022629. The reversal of 665449022592 is 295220944566.

665449022592 is a `hidden beast` number, since 6 + 6 + 5 + 4 + 49 + 0 + 2 + 2 + 592 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5256228 + ... + 5381340.

Almost surely, 2^665449022592 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 665449022592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1046453496000).

665449022592 is an abundant number, since it is smaller than the sum of its proper divisors (1427457969408).

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

665449022592 is an equidigital number, since it uses as much as digits as its factorization.

665449022592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125167 (or 125137 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 54.

The spelling of 665449022592 in words is "six hundred sixty-five billion, four hundred forty-nine million, twenty-two thousand, five hundred ninety-two".