8255766665 has 32 divisors (see below), whose sum is σ = 10514085120. Its totient is φ = 6205780224.

The previous prime is 8255766587. The next prime is 8255766667. The reversal of 8255766665 is 5666675528.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8255766665 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8255766665.

It is not an unprimeable number, because it can be changed into a prime (8255766667) 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, 9413207 + ... + 9414083.

It is an arithmetic number, because the mean of its divisors is an integer number (328565160).

Almost surely, 2^8255766665 is an apocalyptic number.

It is an amenable number.

8255766665 is a deficient number, since it is larger than the sum of its proper divisors (2258318455).

8255766665 is a wasteful number, since it uses less digits than its factorization.

8255766665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601.

The product of its digits is 18144000, while the sum is 56.

The square root of 8255766665 is about 90861.2495236556. The cubic root of 8255766665 is about 2021.0906981824.

The spelling of 8255766665 in words is "eight billion, two hundred fifty-five million, seven hundred sixty-six thousand, six hundred sixty-five".