8255661660 has 72 divisors (see below), whose sum is σ = 25049955840. Its totient is φ = 2200825728.

The previous prime is 8255661647. The next prime is 8255661691. The reversal of 8255661660 is 661665528.

It is a happy number.

8255661660 is a `hidden beast` number, since 8 + 25 + 5 + 6 + 616 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 878949 + ... + 888291.

Almost surely, 2^8255661660 is an apocalyptic number.

It is an amenable number.

8255661660 is an abundant number, since it is smaller than the sum of its proper divisors (16794294180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8255661660 is a wasteful number, since it uses less digits than its factorization.

8255661660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14267 (or 14262 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The square root of 8255661660 is about 90860.6716902313. The cubic root of 8255661660 is about 2021.0821294030.

The spelling of 8255661660 in words is "eight billion, two hundred fifty-five million, six hundred sixty-one thousand, six hundred sixty".