66431704 has 16 divisors (see below), whose sum is σ = 125770320. Its totient is φ = 32892960.

The previous prime is 66431681. The next prime is 66431731. The reversal of 66431704 is 40713466.

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, 39487 + ... + 41134.

It is an arithmetic number, because the mean of its divisors is an integer number (7860645).

Almost surely, 2^66431704 is an apocalyptic number.

It is an amenable number.

66431704 is a deficient number, since it is larger than the sum of its proper divisors (59338616).

66431704 is a wasteful number, since it uses less digits than its factorization.

66431704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80730 (or 80726 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 66431704 is about 8150.5646430171. The cubic root of 66431704 is about 405.0032088350.

The spelling of 66431704 in words is "sixty-six million, four hundred thirty-one thousand, seven hundred four".