512711661 has 64 divisors (see below), whose sum is σ = 885620736. Its totient is φ = 256132800.

The previous prime is 512711657. The next prime is 512711707. The reversal of 512711661 is 166117215.

It is not a de Polignac number, because 512711661 - 2² = 512711657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512711621) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 704880 + ... + 705606.

It is an arithmetic number, because the mean of its divisors is an integer number (13837824).

Almost surely, 2^512711661 is an apocalyptic number.

It is an amenable number.

512711661 is a deficient number, since it is larger than the sum of its proper divisors (372909075).

512711661 is a wasteful number, since it uses less digits than its factorization.

512711661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862.

The product of its digits is 2520, while the sum is 30.

The square root of 512711661 is about 22643.1371722206. The cubic root of 512711661 is about 800.3704851703.

Adding to 512711661 its reverse (166117215), we get a palindrome (678828876).

The spelling of 512711661 in words is "five hundred twelve million, seven hundred eleven thousand, six hundred sixty-one".