65664038 has 24 divisors (see below), whose sum is σ = 113970360. Its totient is φ = 28274400.

The previous prime is 65664037. The next prime is 65664041. The reversal of 65664038 is 83046656.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 65663992 and 65664010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65664037) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2543 + ... + 11738.

It is an arithmetic number, because the mean of its divisors is an integer number (4748765).

Almost surely, 2^65664038 is an apocalyptic number.

65664038 is a deficient number, since it is larger than the sum of its proper divisors (48306322).

65664038 is a wasteful number, since it uses less digits than its factorization.

65664038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14324 (or 14313 counting only the distinct ones).

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

The square root of 65664038 is about 8103.3349924584. The cubic root of 65664038 is about 403.4371266394.

The spelling of 65664038 in words is "sixty-five million, six hundred sixty-four thousand, thirty-eight".