507503661 has 16 divisors (see below), whose sum is σ = 814041600. Its totient is φ = 274738608.

The previous prime is 507503657. The next prime is 507503681. The reversal of 507503661 is 166305705.

It is not a de Polignac number, because 507503661 - 2² = 507503657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (507503621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 635571 + ... + 636368.

It is an arithmetic number, because the mean of its divisors is an integer number (50877600).

Almost surely, 2^507503661 is an apocalyptic number.

It is an amenable number.

507503661 is a deficient number, since it is larger than the sum of its proper divisors (306537939).

507503661 is a wasteful number, since it uses less digits than its factorization.

507503661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271968.

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 507503661 is about 22527.8419072933. The cubic root of 507503661 is about 797.6512678408.

The spelling of 507503661 in words is "five hundred seven million, five hundred three thousand, six hundred sixty-one".