66699670004 has 24 divisors (see below), whose sum is σ = 128338387968. Its totient is φ = 30079304640.

The previous prime is 66699669997. The next prime is 66699670027. The reversal of 66699670004 is 40007699666.

It is a congruent number.

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, 5962529 + ... + 5973704.

It is an arithmetic number, because the mean of its divisors is an integer number (5347432832).

Almost surely, 2^66699670004 is an apocalyptic number.

It is an amenable number.

66699670004 is a deficient number, since it is larger than the sum of its proper divisors (61638717964).

66699670004 is a wasteful number, since it uses less digits than its factorization.

66699670004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11936375 (or 11936373 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 53.

The spelling of 66699670004 in words is "sixty-six billion, six hundred ninety-nine million, six hundred seventy thousand, four".