668793560 has 16 divisors (see below), whose sum is σ = 1504785600. Its totient is φ = 267517408.

The previous prime is 668793553. The next prime is 668793571. The reversal of 668793560 is 65397866.

It is a junction number, because it is equal to n+sod(n) for n = 668793499 and 668793508.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 8359880 + ... + 8359959.

It is an arithmetic number, because the mean of its divisors is an integer number (94049100).

Almost surely, 2^668793560 is an apocalyptic number.

It is an amenable number.

668793560 is an abundant number, since it is smaller than the sum of its proper divisors (835992040).

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

668793560 is a wasteful number, since it uses less digits than its factorization.

668793560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16719850 (or 16719846 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 50.

The square root of 668793560 is about 25861.0432890864. The cubic root of 668793560 is about 874.5084847683.

The spelling of 668793560 in words is "six hundred sixty-eight million, seven hundred ninety-three thousand, five hundred sixty".