668652412 has 12 divisors (see below), whose sum is σ = 1221017616. Its totient is φ = 319790240.

The previous prime is 668652377. The next prime is 668652433. The reversal of 668652412 is 214256866.

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 3 ways as a sum of consecutive naturals, for example, 3633889 + ... + 3634072.

It is an arithmetic number, because the mean of its divisors is an integer number (101751468).

Almost surely, 2^668652412 is an apocalyptic number.

It is an amenable number.

668652412 is a deficient number, since it is larger than the sum of its proper divisors (552365204).

668652412 is a wasteful number, since it uses less digits than its factorization.

668652412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7267988 (or 7267986 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 668652412 is about 25858.3141755220. The cubic root of 668652412 is about 874.4469591519.

The spelling of 668652412 in words is "six hundred sixty-eight million, six hundred fifty-two thousand, four hundred twelve".