65864385 has 24 divisors (see below), whose sum is σ = 115240320. Its totient is φ = 34796832.

The previous prime is 65864377. The next prime is 65864399. The reversal of 65864385 is 58346856.

It is not a de Polignac number, because 65864385 - 2³ = 65864377 is a prime.

It is a super-2 number, since 2×65864385² = 8676234422856450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 65864385.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2025 + ... + 11654.

It is an arithmetic number, because the mean of its divisors is an integer number (4801680).

Almost surely, 2^65864385 is an apocalyptic number.

It is an amenable number.

65864385 is a deficient number, since it is larger than the sum of its proper divisors (49375935).

65864385 is a wasteful number, since it uses less digits than its factorization.

65864385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13797 (or 13794 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The square root of 65864385 is about 8115.6875863971. The cubic root of 65864385 is about 403.8470179364.

The spelling of 65864385 in words is "sixty-five million, eight hundred sixty-four thousand, three hundred eighty-five".