668504562 has 32 divisors (see below), whose sum is σ = 1460337984. Its totient is φ = 202329600.

The previous prime is 668504537. The next prime is 668504579. The reversal of 668504562 is 265405866.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52398 + ... + 63894.

It is an arithmetic number, because the mean of its divisors is an integer number (45635562).

Almost surely, 2^668504562 is an apocalyptic number.

668504562 is an abundant number, since it is smaller than the sum of its proper divisors (791833422).

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

668504562 is a wasteful number, since it uses less digits than its factorization.

668504562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12394.

The product of its (nonzero) digits is 345600, while the sum is 42.

The square root of 668504562 is about 25855.4551690741. The cubic root of 668504562 is about 874.3825028858.

The spelling of 668504562 in words is "six hundred sixty-eight million, five hundred four thousand, five hundred sixty-two".