65615055 has 32 divisors (see below), whose sum is σ = 116978688. Its totient is φ = 31132800.

The previous prime is 65615051. The next prime is 65615063. The reversal of 65615055 is 55051656.

It is not a de Polignac number, because 65615055 - 2² = 65615051 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65615051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3525 + ... + 11985.

It is an arithmetic number, because the mean of its divisors is an integer number (3655584).

Almost surely, 2^65615055 is an apocalyptic number.

65615055 is a deficient number, since it is larger than the sum of its proper divisors (51363633).

65615055 is a wasteful number, since it uses less digits than its factorization.

65615055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8527.

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 65615055 is about 8100.3120310270. The cubic root of 65615055 is about 403.3367851779.

The spelling of 65615055 in words is "sixty-five million, six hundred fifteen thousand, fifty-five".