64660677 has 8 divisors (see below), whose sum is σ = 86328864. Its totient is φ = 43049808.

The previous prime is 64660663. The next prime is 64660681. The reversal of 64660677 is 77606646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-64660677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64660627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11623 + ... + 16260.

It is an arithmetic number, because the mean of its divisors is an integer number (10791108).

Almost surely, 2^64660677 is an apocalyptic number.

It is an amenable number.

64660677 is a deficient number, since it is larger than the sum of its proper divisors (21668187).

64660677 is a wasteful number, since it uses less digits than its factorization.

64660677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28659.

The product of its (nonzero) digits is 254016, while the sum is 42.

The square root of 64660677 is about 8041.1862930789. The cubic root of 64660677 is about 401.3717011297.

The spelling of 64660677 in words is "sixty-four million, six hundred sixty thousand, six hundred seventy-seven".