512408661 has 4 divisors (see below), whose sum is σ = 683211552. Its totient is φ = 341605772.

The previous prime is 512408639. The next prime is 512408669. The reversal of 512408661 is 166804215.

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.

It is a cyclic number.

It is not a de Polignac number, because 512408661 - 2¹¹ = 512406613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512408669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85401441 + ... + 85401446.

It is an arithmetic number, because the mean of its divisors is an integer number (170802888).

Almost surely, 2^512408661 is an apocalyptic number.

It is an amenable number.

512408661 is a deficient number, since it is larger than the sum of its proper divisors (170802891).

512408661 is a wasteful number, since it uses less digits than its factorization.

512408661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170802890.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 512408661 is about 22636.4454144196. The cubic root of 512408661 is about 800.2127876676.

The spelling of 512408661 in words is "five hundred twelve million, four hundred eight thousand, six hundred sixty-one".