668551092 has 24 divisors (see below), whose sum is σ = 1701766752. Its totient is φ = 202591200.

The previous prime is 668551069. The next prime is 668551127. The reversal of 668551092 is 290155866.

It is a super-2 number, since 2×668551092² = 893921125228784928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2532259 + ... + 2532522.

It is an arithmetic number, because the mean of its divisors is an integer number (70906948).

Almost surely, 2^668551092 is an apocalyptic number.

It is an amenable number.

668551092 is an abundant number, since it is smaller than the sum of its proper divisors (1033215660).

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

668551092 is a wasteful number, since it uses less digits than its factorization.

668551092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5064799 (or 5064797 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 668551092 is about 25856.3549635288. The cubic root of 668551092 is about 874.4027889972.

The spelling of 668551092 in words is "six hundred sixty-eight million, five hundred fifty-one thousand, ninety-two".