65616464 has 40 divisors (see below), whose sum is σ = 135212328. Its totient is φ = 30740480.

The previous prime is 65616461. The next prime is 65616487. The reversal of 65616464 is 46461656.

65616464 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 4 ways, for example, as 652864 + 64963600 = 808^2 + 8060^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65616461) 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 7 ways as a sum of consecutive naturals, for example, 85844 + ... + 86604.

Almost surely, 2^65616464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65616464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67606164).

65616464 is an abundant number, since it is smaller than the sum of its proper divisors (69595864).

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

65616464 is a wasteful number, since it uses less digits than its factorization.

65616464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103 (or 1097 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

The square root of 65616464 is about 8100.3990025183. The cubic root of 65616464 is about 403.3396722057.

The spelling of 65616464 in words is "sixty-five million, six hundred sixteen thousand, four hundred sixty-four".