667665004 has 24 divisors (see below), whose sum is σ = 1258120080. Its totient is φ = 308868096.

The previous prime is 667664989. The next prime is 667665023. The reversal of 667665004 is 400566766.

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, 79197 + ... + 87220.

It is an arithmetic number, because the mean of its divisors is an integer number (52421670).

Almost surely, 2^667665004 is an apocalyptic number.

It is an amenable number.

667665004 is a deficient number, since it is larger than the sum of its proper divisors (590455076).

667665004 is a wasteful number, since it uses less digits than its factorization.

667665004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166497 (or 166495 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 667665004 is about 25839.2144617440. The cubic root of 667665004 is about 874.0163112435.

The spelling of 667665004 in words is "six hundred sixty-seven million, six hundred sixty-five thousand, four".