66604712 has 8 divisors (see below), whose sum is σ = 124883850. Its totient is φ = 33302352.

The previous prime is 66604697. The next prime is 66604717. The reversal of 66604712 is 21740666.

It can be written as a sum of positive squares in only one way, i.e., 60621796 + 5982916 = 7786^2 + 2446^2 .

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 (66604717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4162787 + ... + 4162802.

Almost surely, 2^66604712 is an apocalyptic number.

It is an amenable number.

66604712 is a deficient number, since it is larger than the sum of its proper divisors (58279138).

66604712 is a wasteful number, since it uses less digits than its factorization.

66604712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8325595 (or 8325591 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 66604712 is about 8161.1709944101. The cubic root of 66604712 is about 405.3544871760.

The spelling of 66604712 in words is "sixty-six million, six hundred four thousand, seven hundred twelve".