64277664 has 48 divisors (see below), whose sum is σ = 184070880. Its totient is φ = 19477760.

The previous prime is 64277657. The next prime is 64277671. The reversal of 64277664 is 46677246.

It is an interprime number because it is at equal distance from previous prime (64277657) and next prime (64277671).

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29379 + ... + 31490.

It is an arithmetic number, because the mean of its divisors is an integer number (3834810).

Almost surely, 2^64277664 is an apocalyptic number.

It is an amenable number.

64277664 is an abundant number, since it is smaller than the sum of its proper divisors (119793216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64277664 is a wasteful number, since it uses less digits than its factorization.

64277664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60893 (or 60885 counting only the distinct ones).

The product of its digits is 338688, while the sum is 42.

The square root of 64277664 is about 8017.3352181383. The cubic root of 64277664 is about 400.5776321180.

The spelling of 64277664 in words is "sixty-four million, two hundred seventy-seven thousand, six hundred sixty-four".