668817084 has 24 divisors (see below), whose sum is σ = 1680617680. Its totient is φ = 205789824.

The previous prime is 668817059. The next prime is 668817091. The reversal of 668817084 is 480718866.

It is a super-3 number, since 3×668817084³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2143489 + ... + 2143800.

Almost surely, 2^668817084 is an apocalyptic number.

It is an amenable number.

668817084 is an abundant number, since it is smaller than the sum of its proper divisors (1011800596).

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

668817084 is a wasteful number, since it uses less digits than its factorization.

668817084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4287309 (or 4287307 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 48.

The square root of 668817084 is about 25861.4981004581. The cubic root of 668817084 is about 874.5187379055.

The spelling of 668817084 in words is "six hundred sixty-eight million, eight hundred seventeen thousand, eighty-four".