668390592 has 56 divisors (see below), whose sum is σ = 1793394432. Its totient is φ = 219654400.

The previous prime is 668390563. The next prime is 668390599. The reversal of 668390592 is 295093866.

668390592 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×668390592² = 893491966948220928, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (668390599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10884 + ... + 38147.

Almost surely, 2^668390592 is an apocalyptic number.

It is an amenable number.

668390592 is an abundant number, since it is smaller than the sum of its proper divisors (1125003840).

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

668390592 is a wasteful number, since it uses less digits than its factorization.

668390592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49117 (or 49107 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 48.

The square root of 668390592 is about 25853.2510914972. The cubic root of 668390592 is about 874.3328103616.

The spelling of 668390592 in words is "six hundred sixty-eight million, three hundred ninety thousand, five hundred ninety-two".