507456661 has 4 divisors (see below), whose sum is σ = 507505024. Its totient is φ = 507408300.

The previous prime is 507456643. The next prime is 507456679. The reversal of 507456661 is 166654705.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (507456643) and next prime (507456679).

It is a cyclic number.

It is not a de Polignac number, because 507456661 - 2⁵ = 507456629 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 (507456641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1095 + ... + 31876.

It is an arithmetic number, because the mean of its divisors is an integer number (126876256).

Almost surely, 2^507456661 is an apocalyptic number.

It is an amenable number.

507456661 is a deficient number, since it is larger than the sum of its proper divisors (48363).

507456661 is a wasteful number, since it uses less digits than its factorization.

507456661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48362.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 507456661 is about 22526.7987295133. The cubic root of 507456661 is about 797.6266435409.

The spelling of 507456661 in words is "five hundred seven million, four hundred fifty-six thousand, six hundred sixty-one".