65815385 has 8 divisors (see below), whose sum is σ = 80317440. Its totient is φ = 51759664.

The previous prime is 65815363. The next prime is 65815391. The reversal of 65815385 is 58351856.

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

It is a cyclic number.

It is not a de Polignac number, because 65815385 - 2²² = 61621081 is a prime.

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, 111257 + ... + 111846.

It is an arithmetic number, because the mean of its divisors is an integer number (10039680).

Almost surely, 2^65815385 is an apocalyptic number.

It is an amenable number.

65815385 is a deficient number, since it is larger than the sum of its proper divisors (14502055).

65815385 is a wasteful number, since it uses less digits than its factorization.

65815385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223167.

The product of its digits is 144000, while the sum is 41.

The square root of 65815385 is about 8112.6681800749. The cubic root of 65815385 is about 403.7468453715.

The spelling of 65815385 in words is "sixty-five million, eight hundred fifteen thousand, three hundred eighty-five".