566531256506655 has 48 divisors (see below), whose sum is σ = 1030702633763040. Its totient is φ = 265210034369280.

The previous prime is 566531256506491. The next prime is 566531256506687. The reversal of 566531256506655 is 556605652135665.

It is not a de Polignac number, because 566531256506655 - 2⁹ = 566531256506143 is a prime.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5381644492 + ... + 5381749761.

It is an arithmetic number, because the mean of its divisors is an integer number (21472971536730).

Almost surely, 2^{566531256506655} is an apocalyptic number.

566531256506655 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

566531256506655 is a deficient number, since it is larger than the sum of its proper divisors (464171377256385).

566531256506655 is a wasteful number, since it uses less digits than its factorization.

566531256506655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10763394312 (or 10763394301 counting only the distinct ones).

The product of its (nonzero) digits is 729000000, while the sum is 66.

The spelling of 566531256506655 in words is "five hundred sixty-six trillion, five hundred thirty-one billion, two hundred fifty-six million, five hundred six thousand, six hundred fifty-five".