668946120 has 32 divisors (see below), whose sum is σ = 2006838720. Its totient is φ = 178385600.

The previous prime is 668946077. The next prime is 668946121. The reversal of 668946120 is 21649866.

It is a super-2 number, since 2×668946120² = 894977822926108800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (668946121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2787156 + ... + 2787395.

It is an arithmetic number, because the mean of its divisors is an integer number (62713710).

Almost surely, 2^668946120 is an apocalyptic number.

668946120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

668946120 is an abundant number, since it is smaller than the sum of its proper divisors (1337892600).

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

668946120 is a wasteful number, since it uses less digits than its factorization.

668946120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5574565 (or 5574561 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 668946120 is about 25863.9927312084. The cubic root of 668946120 is about 874.5749750772.

The spelling of 668946120 in words is "six hundred sixty-eight million, nine hundred forty-six thousand, one hundred twenty".