655206550566 has 48 divisors (see below), whose sum is σ = 1392361684560. Its totient is φ = 205506096640.

The previous prime is 655206550553. The next prime is 655206550597. The reversal of 655206550566 is 665055602556.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

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, 7623280 + ... + 7708748.

It is an arithmetic number, because the mean of its divisors is an integer number (29007535095).

Almost surely, 2^655206550566 is an apocalyptic number.

655206550566 is an abundant number, since it is smaller than the sum of its proper divisors (737155133994).

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

655206550566 is a wasteful number, since it uses less digits than its factorization.

655206550566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89929 (or 89912 counting only the distinct ones).

The product of its (nonzero) digits is 8100000, while the sum is 51.

The spelling of 655206550566 in words is "six hundred fifty-five billion, two hundred six million, five hundred fifty thousand, five hundred sixty-six".