66039712 has 12 divisors (see below), whose sum is σ = 130015746. Its totient is φ = 33019840.

The previous prime is 66039671. The next prime is 66039751. The reversal of 66039712 is 21793066.

It can be written as a sum of positive squares in only one way, i.e., 61528336 + 4511376 = 7844^2 + 2124^2 .

It is a super-2 number, since 2×66039712² = 8722487122085888, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1031839 + ... + 1031902.

Almost surely, 2^66039712 is an apocalyptic number.

It is an amenable number.

66039712 is a deficient number, since it is larger than the sum of its proper divisors (63976034).

66039712 is a wasteful number, since it uses less digits than its factorization.

66039712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2063751 (or 2063743 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 66039712 is about 8126.4821417388. The cubic root of 66039712 is about 404.2050392069.

The spelling of 66039712 in words is "sixty-six million, thirty-nine thousand, seven hundred twelve".