506661615655 has 16 divisors (see below), whose sum is σ = 677340730080. Its totient is φ = 361248386688.

The previous prime is 506661615613. The next prime is 506661615661. The reversal of 506661615655 is 556516166605.

It is a cyclic number.

It is not a de Polignac number, because 506661615655 - 2⁷ = 506661615527 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134391117 + ... + 134394886.

It is an arithmetic number, because the mean of its divisors is an integer number (42333795630).

Almost surely, 2^506661615655 is an apocalyptic number.

506661615655 is a deficient number, since it is larger than the sum of its proper divisors (170679114425).

506661615655 is a wasteful number, since it uses less digits than its factorization.

506661615655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268786050.

The product of its (nonzero) digits is 4860000, while the sum is 52.

The spelling of 506661615655 in words is "five hundred six billion, six hundred sixty-one million, six hundred fifteen thousand, six hundred fifty-five".