66731044 has 6 divisors (see below), whose sum is σ = 116779334. Its totient is φ = 33365520.

The previous prime is 66731039. The next prime is 66731051. The reversal of 66731044 is 44013766.

It can be written as a sum of positive squares in only one way, i.e., 53114944 + 13616100 = 7288^2 + 3690^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66730997 and 66731015.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8341377 + ... + 8341384.

Almost surely, 2^66731044 is an apocalyptic number.

It is an amenable number.

66731044 is a deficient number, since it is larger than the sum of its proper divisors (50048290).

66731044 is a wasteful number, since it uses less digits than its factorization.

66731044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16682765 (or 16682763 counting only the distinct ones).

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

The square root of 66731044 is about 8168.9071484502. The cubic root of 66731044 is about 405.6106096970.

The spelling of 66731044 in words is "sixty-six million, seven hundred thirty-one thousand, forty-four".