668776120 has 16 divisors (see below), whose sum is σ = 1504746360. Its totient is φ = 267510432.

The previous prime is 668776099. The next prime is 668776127. The reversal of 668776120 is 21677866.

It is a super-2 number, since 2×668776120² = 894522997364508800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668776127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8359662 + ... + 8359741.

Almost surely, 2^668776120 is an apocalyptic number.

It is an amenable number.

668776120 is an abundant number, since it is smaller than the sum of its proper divisors (835970240).

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

668776120 is a wasteful number, since it uses less digits than its factorization.

668776120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16719414 (or 16719410 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 668776120 is about 25860.7061001822. The cubic root of 668776120 is about 874.5008832395.

The spelling of 668776120 in words is "six hundred sixty-eight million, seven hundred seventy-six thousand, one hundred twenty".