668678376 has 64 divisors (see below), whose sum is σ = 1693771200. Its totient is φ = 219967488.

The previous prime is 668678371. The next prime is 668678377. The reversal of 668678376 is 673876866.

It is a happy number.

Its product of digits (12192768) is a multiple of the sum of its prime divisors (1134).

It is not an unprimeable number, because it can be changed into a prime (668678371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1158600 + ... + 1159176.

It is an arithmetic number, because the mean of its divisors is an integer number (26465175).

Almost surely, 2^668678376 is an apocalyptic number.

It is an amenable number.

668678376 is an abundant number, since it is smaller than the sum of its proper divisors (1025092824).

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

668678376 is a wasteful number, since it uses less digits than its factorization.

668678376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138 (or 1134 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 57.

The square root of 668678376 is about 25858.8162142044. The cubic root of 668678376 is about 874.4582773627.

The spelling of 668678376 in words is "six hundred sixty-eight million, six hundred seventy-eight thousand, three hundred seventy-six".