668606412 has 24 divisors (see below), whose sum is σ = 1627911936. Its totient is φ = 213178768.

The previous prime is 668606401. The next prime is 668606453. The reversal of 668606412 is 214606866.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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, 1210968 + ... + 1211519.

It is an arithmetic number, because the mean of its divisors is an integer number (67829664).

Almost surely, 2^668606412 is an apocalyptic number.

It is an amenable number.

668606412 is an abundant number, since it is smaller than the sum of its proper divisors (959305524).

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

668606412 is a wasteful number, since it uses less digits than its factorization.

668606412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2422517 (or 2422515 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 668606412 is about 25857.4246977536. The cubic root of 668606412 is about 874.4269061408.

The spelling of 668606412 in words is "six hundred sixty-eight million, six hundred six thousand, four hundred twelve".