64977064 has 8 divisors (see below), whose sum is σ = 121832010. Its totient is φ = 32488528.

The previous prime is 64977061. The next prime is 64977067. The reversal of 64977064 is 46077946.

It is an interprime number because it is at equal distance from previous prime (64977061) and next prime (64977067).

It can be written as a sum of positive squares in only one way, i.e., 57912100 + 7064964 = 7610^2 + 2658^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 64977064.

It is not an unprimeable number, because it can be changed into a prime (64977061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4061059 + ... + 4061074.

Almost surely, 2^64977064 is an apocalyptic number.

It is an amenable number.

64977064 is a deficient number, since it is larger than the sum of its proper divisors (56854946).

64977064 is a wasteful number, since it uses less digits than its factorization.

64977064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8122139 (or 8122135 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 64977064 is about 8060.8351924599. The cubic root of 64977064 is about 402.0252783127.

The spelling of 64977064 in words is "sixty-four million, nine hundred seventy-seven thousand, sixty-four".