64656712 has 16 divisors (see below), whose sum is σ = 128362860. Its totient is φ = 30426624.

The previous prime is 64656673. The next prime is 64656719. The reversal of 64656712 is 21765646.

It is a happy number.

64656712 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 64545156 + 111556 = 8034^2 + 334^2 .

It is not an unprimeable number, because it can be changed into a prime (64656719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237573 + ... + 237844.

Almost surely, 2^64656712 is an apocalyptic number.

It is an amenable number.

64656712 is a deficient number, since it is larger than the sum of its proper divisors (63706148).

64656712 is a wasteful number, since it uses less digits than its factorization.

64656712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475440 (or 475436 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 64656712 is about 8040.9397460745. The cubic root of 64656712 is about 401.3634969094.

The spelling of 64656712 in words is "sixty-four million, six hundred fifty-six thousand, seven hundred twelve".