507661660 has 24 divisors (see below), whose sum is σ = 1163007216. Its totient is φ = 184604160.

The previous prime is 507661619. The next prime is 507661669. The reversal of 507661660 is 66166705.

It is a happy number.

It is a super-2 number, since 2×507661660² = 515440722067911200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (507661669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1153557 + ... + 1153996.

It is an arithmetic number, because the mean of its divisors is an integer number (48458634).

Almost surely, 2^507661660 is an apocalyptic number.

It is an amenable number.

507661660 is an abundant number, since it is smaller than the sum of its proper divisors (655345556).

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

507661660 is a wasteful number, since it uses less digits than its factorization.

507661660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2307573 (or 2307571 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 507661660 is about 22531.3483839738. The cubic root of 507661660 is about 797.7340357339.

The spelling of 507661660 in words is "five hundred seven million, six hundred sixty-one thousand, six hundred sixty".