668295620 has 48 divisors (see below), whose sum is σ = 1418829888. Its totient is φ = 264401280.

The previous prime is 668295611. The next prime is 668295631. The reversal of 668295620 is 26592866.

668295620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×668295620² = 893238071422368800, which contains 22 as substring.

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, 1039019 + ... + 1039661.

It is an arithmetic number, because the mean of its divisors is an integer number (29558956).

Almost surely, 2^668295620 is an apocalyptic number.

It is an amenable number.

668295620 is an abundant number, since it is smaller than the sum of its proper divisors (750534268).

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

668295620 is a wasteful number, since it uses less digits than its factorization.

668295620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140 (or 1138 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 668295620 is about 25851.4142746582. The cubic root of 668295620 is about 874.2913969176.

The spelling of 668295620 in words is "six hundred sixty-eight million, two hundred ninety-five thousand, six hundred twenty".