668462790 has 64 divisors (see below), whose sum is σ = 1628729856. Its totient is φ = 175564032.

The previous prime is 668462761. The next prime is 668462803. The reversal of 668462790 is 97264866.

It is a super-2 number, since 2×668462790² = 893685003229168200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 700954 + ... + 701906.

It is an arithmetic number, because the mean of its divisors is an integer number (25448904).

Almost surely, 2^668462790 is an apocalyptic number.

668462790 is an abundant number, since it is smaller than the sum of its proper divisors (960267066).

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

668462790 is a wasteful number, since it uses less digits than its factorization.

668462790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293.

The product of its (nonzero) digits is 870912, while the sum is 48.

The square root of 668462790 is about 25854.6473578736. The cubic root of 668462790 is about 874.3642903616.

The spelling of 668462790 in words is "six hundred sixty-eight million, four hundred sixty-two thousand, seven hundred ninety".