64660144 has 20 divisors (see below), whose sum is σ = 126052696. Its totient is φ = 32130432.

The previous prime is 64660133. The next prime is 64660151. The reversal of 64660144 is 44106646.

64660144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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, 9789 + ... + 15004.

Almost surely, 2^64660144 is an apocalyptic number.

It is an amenable number.

64660144 is a deficient number, since it is larger than the sum of its proper divisors (61392552).

64660144 is a wasteful number, since it uses less digits than its factorization.

64660144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24964 (or 24958 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 64660144 is about 8041.1531511345. The cubic root of 64660144 is about 401.3705982868.

The spelling of 64660144 in words is "sixty-four million, six hundred sixty thousand, one hundred forty-four".