66691134704 has 40 divisors (see below), whose sum is σ = 130923703680. Its totient is φ = 32907250368.

The previous prime is 66691134689. The next prime is 66691134709. The reversal of 66691134704 is 40743119666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66691134709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281627 + ... + 461189.

It is an arithmetic number, because the mean of its divisors is an integer number (3273092592).

Almost surely, 2^66691134704 is an apocalyptic number.

It is an amenable number.

66691134704 is a deficient number, since it is larger than the sum of its proper divisors (64232568976).

66691134704 is a wasteful number, since it uses less digits than its factorization.

66691134704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179877 (or 179871 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 47.

The spelling of 66691134704 in words is "sixty-six billion, six hundred ninety-one million, one hundred thirty-four thousand, seven hundred four".