65664455 has 16 divisors (see below), whose sum is σ = 85691520. Its totient is φ = 48102912.

The previous prime is 65664427. The next prime is 65664481. The reversal of 65664455 is 55446656.

It is a cyclic number.

It is not a de Polignac number, because 65664455 - 2⁸ = 65664199 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7295 + ... + 13584.

It is an arithmetic number, because the mean of its divisors is an integer number (5355720).

Almost surely, 2^65664455 is an apocalyptic number.

65664455 is a deficient number, since it is larger than the sum of its proper divisors (20027065).

65664455 is a wasteful number, since it uses less digits than its factorization.

65664455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20938.

The product of its digits is 432000, while the sum is 41.

The square root of 65664455 is about 8103.3607225644. The cubic root of 65664455 is about 403.4379806478.

The spelling of 65664455 in words is "sixty-five million, six hundred sixty-four thousand, four hundred fifty-five".