668651116 has 24 divisors (see below), whose sum is σ = 1407687680. Its totient is φ = 271482192.

The previous prime is 668651107. The next prime is 668651141. The reversal of 668651116 is 611156866.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 627900 + ... + 628963.

Almost surely, 2^668651116 is an apocalyptic number.

It is an amenable number.

668651116 is an abundant number, since it is smaller than the sum of its proper divisors (739036564).

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

668651116 is a wasteful number, since it uses less digits than its factorization.

668651116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256893 (or 1256891 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 668651116 is about 25858.2891158715. The cubic root of 668651116 is about 874.4463941927.

The spelling of 668651116 in words is "six hundred sixty-eight million, six hundred fifty-one thousand, one hundred sixteen".