668556084 has 48 divisors (see below), whose sum is σ = 1795673600. Its totient is φ = 189638496.

The previous prime is 668556079. The next prime is 668556103. The reversal of 668556084 is 480655866.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 16954 + ... + 40305.

Almost surely, 2^668556084 is an apocalyptic number.

It is an amenable number.

668556084 is an abundant number, since it is smaller than the sum of its proper divisors (1127117516).

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

668556084 is a wasteful number, since it uses less digits than its factorization.

668556084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57412 (or 57410 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 48.

The square root of 668556084 is about 25856.4514966768. The cubic root of 668556084 is about 874.4049653494.

The spelling of 668556084 in words is "six hundred sixty-eight million, five hundred fifty-six thousand, eighty-four".