66544264 has 16 divisors (see below), whose sum is σ = 125225100. Its totient is φ = 33150912.

The previous prime is 66544237. The next prime is 66544279. The reversal of 66544264 is 46244566.

It can be written as a sum of positive squares in 2 ways, for example, as 64931364 + 1612900 = 8058^2 + 1270^2 .

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, 12799 + ... + 17230.

Almost surely, 2^66544264 is an apocalyptic number.

It is an amenable number.

66544264 is a deficient number, since it is larger than the sum of its proper divisors (58680836).

66544264 is a wasteful number, since it uses less digits than its factorization.

66544264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30312 (or 30308 counting only the distinct ones).

The product of its digits is 138240, while the sum is 37.

The square root of 66544264 is about 8157.4667636467. The cubic root of 66544264 is about 405.2318217585.

The spelling of 66544264 in words is "sixty-six million, five hundred forty-four thousand, two hundred sixty-four".