655668855 has 12 divisors (see below), whose sum is σ = 1136492760. Its totient is φ = 349690032.

The previous prime is 655668779. The next prime is 655668877. The reversal of 655668855 is 558866556.

655668855 is a `hidden beast` number, since 6 + 556 + 6 + 8 + 85 + 5 = 666.

It is not a de Polignac number, because 655668855 - 2¹¹ = 655666807 is a prime.

It is a super-2 number, since 2×655668855² = 859803294834022050, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 7285165 + ... + 7285254.

It is an arithmetic number, because the mean of its divisors is an integer number (94707730).

Almost surely, 2^655668855 is an apocalyptic number.

655668855 is a deficient number, since it is larger than the sum of its proper divisors (480823905).

655668855 is a wasteful number, since it uses less digits than its factorization.

655668855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14570430 (or 14570427 counting only the distinct ones).

The product of its digits is 8640000, while the sum is 54.

The square root of 655668855 is about 25606.0316136648. The cubic root of 655668855 is about 868.7500679399.

The spelling of 655668855 in words is "six hundred fifty-five million, six hundred sixty-eight thousand, eight hundred fifty-five".