668046688 has 48 divisors (see below), whose sum is σ = 1465899120. Its totient is φ = 297824256.

The previous prime is 668046679. The next prime is 668046703. The reversal of 668046688 is 886640866.

It is a congruent 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, 21981 + ... + 42652.

It is an arithmetic number, because the mean of its divisors is an integer number (30539565).

Almost surely, 2^668046688 is an apocalyptic number.

668046688 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

668046688 is an abundant number, since it is smaller than the sum of its proper divisors (797852432).

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

668046688 is a wasteful number, since it uses less digits than its factorization.

668046688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64679 (or 64671 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 52.

The square root of 668046688 is about 25846.5991573360. The cubic root of 668046688 is about 874.1828291283.

The spelling of 668046688 in words is "six hundred sixty-eight million, forty-six thousand, six hundred eighty-eight".