668510798 has 16 divisors (see below), whose sum is σ = 1037076480. Its totient is φ = 322998936.

The previous prime is 668510789. The next prime is 668510803. The reversal of 668510798 is 897015866.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37586 + ... + 52437.

It is an arithmetic number, because the mean of its divisors is an integer number (64817280).

Almost surely, 2^668510798 is an apocalyptic number.

668510798 is a deficient number, since it is larger than the sum of its proper divisors (368565682).

668510798 is a wasteful number, since it uses less digits than its factorization.

668510798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90151.

The product of its (nonzero) digits is 725760, while the sum is 50.

The square root of 668510798 is about 25855.5757622993. The cubic root of 668510798 is about 874.3852217066.

The spelling of 668510798 in words is "six hundred sixty-eight million, five hundred ten thousand, seven hundred ninety-eight".