507661661 has 8 divisors (see below), whose sum is σ = 546908544. Its totient is φ = 468442800.

The previous prime is 507661619. The next prime is 507661669. The reversal of 507661661 is 166166705.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 507661661 - 2⁶ = 507661597 is a prime.

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, 44936 + ... + 55086.

It is an arithmetic number, because the mean of its divisors is an integer number (68363568).

Almost surely, 2^507661661 is an apocalyptic number.

It is an amenable number.

507661661 is a deficient number, since it is larger than the sum of its proper divisors (39246883).

507661661 is a wasteful number, since it uses less digits than its factorization.

507661661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14011.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 507661661 is about 22531.3484061651. The cubic root of 507661661 is about 797.7340362577.

The spelling of 507661661 in words is "five hundred seven million, six hundred sixty-one thousand, six hundred sixty-one".