65657680255 has 4 divisors (see below), whose sum is σ = 78789216312. Its totient is φ = 52526144200.

The previous prime is 65657680247. The next prime is 65657680267. The reversal of 65657680255 is 55208675656.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 65657680255 - 2³ = 65657680247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65657680196 and 65657680205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6565768021 + ... + 6565768030.

It is an arithmetic number, because the mean of its divisors is an integer number (19697304078).

Almost surely, 2^65657680255 is an apocalyptic number.

65657680255 is a deficient number, since it is larger than the sum of its proper divisors (13131536057).

65657680255 is a wasteful number, since it uses less digits than its factorization.

65657680255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13131536056.

The product of its (nonzero) digits is 15120000, while the sum is 55.

The spelling of 65657680255 in words is "sixty-five billion, six hundred fifty-seven million, six hundred eighty thousand, two hundred fifty-five".