64659895 has 16 divisors (see below), whose sum is σ = 78640128. Its totient is φ = 51035040.

The previous prime is 64659883. The next prime is 64659899. The reversal of 64659895 is 59895646.

It is not a de Polignac number, because 64659895 - 2⁷ = 64659767 is a prime.

It is a super-2 number, since 2×64659895² = 8361804042822050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64659899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176002 + ... + 176368.

It is an arithmetic number, because the mean of its divisors is an integer number (4915008).

Almost surely, 2^64659895 is an apocalyptic number.

64659895 is a deficient number, since it is larger than the sum of its proper divisors (13980233).

64659895 is a wasteful number, since it uses less digits than its factorization.

64659895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750.

The product of its digits is 2332800, while the sum is 52.

The square root of 64659895 is about 8041.1376682656. The cubic root of 64659895 is about 401.3700830730.

The spelling of 64659895 in words is "sixty-four million, six hundred fifty-nine thousand, eight hundred ninety-five".