508613661 has 10 divisors (see below), whose sum is σ = 759781022. Its totient is φ = 339075720.

The previous prime is 508613639. The next prime is 508613681. The reversal of 508613661 is 166316805.

It is a happy number.

508613661 is a `hidden beast` number, since 508 + 61 + 36 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 492573636 + 16040025 = 22194^2 + 4005^2 .

It is not a de Polignac number, because 508613661 - 2⁶ = 508613597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (508613681) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3139510 + ... + 3139671.

Almost surely, 2^508613661 is an apocalyptic number.

It is an amenable number.

508613661 is a deficient number, since it is larger than the sum of its proper divisors (251167361).

508613661 is an equidigital number, since it uses as much as digits as its factorization.

508613661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6279193 (or 6279184 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 508613661 is about 22552.4646324964. The cubic root of 508613661 is about 798.2323790425.

The spelling of 508613661 in words is "five hundred eight million, six hundred thirteen thousand, six hundred sixty-one".