666667037404 has 12 divisors (see below), whose sum is σ = 1195122616128. Its totient is φ = 325203432800.

The previous prime is 666667037389. The next prime is 666667037429. The reversal of 666667037404 is 404730766666.

It is a happy number.

It is a super-2 number, since 2×666667037404² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2032521292 + ... + 2032521619.

It is an arithmetic number, because the mean of its divisors is an integer number (99593551344).

Almost surely, 2^666667037404 is an apocalyptic number.

It is an amenable number.

666667037404 is a deficient number, since it is larger than the sum of its proper divisors (528455578724).

666667037404 is a wasteful number, since it uses less digits than its factorization.

666667037404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4065042956 (or 4065042954 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 55.

The spelling of 666667037404 in words is "six hundred sixty-six billion, six hundred sixty-seven million, thirty-seven thousand, four hundred four".