66712936 has 8 divisors (see below), whose sum is σ = 125086770. Its totient is φ = 33356464.

The previous prime is 66712931. The next prime is 66712937. The reversal of 66712936 is 63921766.

It can be written as a sum of positive squares in only one way, i.e., 64480900 + 2232036 = 8030^2 + 1494^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (66712931) by changing a digit.

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, 4169551 + ... + 4169566.

Almost surely, 2^66712936 is an apocalyptic number.

It is an amenable number.

66712936 is a deficient number, since it is larger than the sum of its proper divisors (58373834).

66712936 is a wasteful number, since it uses less digits than its factorization.

66712936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8339123 (or 8339119 counting only the distinct ones).

The product of its digits is 81648, while the sum is 40.

The square root of 66712936 is about 8167.7987242586. The cubic root of 66712936 is about 405.5739178220.

The spelling of 66712936 in words is "sixty-six million, seven hundred twelve thousand, nine hundred thirty-six".