65505065551 has 8 divisors (see below), whose sum is σ = 68956131200. Its totient is φ = 62054343000.

The previous prime is 65505065519. The next prime is 65505065581. The reversal of 65505065551 is 15556050556.

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 65505065551 - 2⁵ = 65505065519 is a prime.

It is a super-2 number, since 2×65505065551² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65505065498 and 65505065507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65505065581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367630 + ... + 515908.

It is an arithmetic number, because the mean of its divisors is an integer number (8619516400).

Almost surely, 2^65505065551 is an apocalyptic number.

65505065551 is a deficient number, since it is larger than the sum of its proper divisors (3451065649).

65505065551 is a wasteful number, since it uses less digits than its factorization.

65505065551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171549.

The product of its (nonzero) digits is 562500, while the sum is 43.

The spelling of 65505065551 in words is "sixty-five billion, five hundred five million, sixty-five thousand, five hundred fifty-one".