668717004 has 12 divisors (see below), whose sum is σ = 1560339704. Its totient is φ = 222905664.

The previous prime is 668716999. The next prime is 668717009. The reversal of 668717004 is 400717866.

It is an interprime number because it is at equal distance from previous prime (668716999) and next prime (668717009).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (668717009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27863197 + ... + 27863220.

Almost surely, 2^668717004 is an apocalyptic number.

It is an amenable number.

668717004 is an abundant number, since it is smaller than the sum of its proper divisors (891622700).

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

668717004 is a wasteful number, since it uses less digits than its factorization.

668717004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55726424 (or 55726422 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 668717004 is about 25859.5631053581. The cubic root of 668717004 is about 874.4751155145.

The spelling of 668717004 in words is "six hundred sixty-eight million, seven hundred seventeen thousand, four".