513652666 has 8 divisors (see below), whose sum is σ = 770594400. Its totient is φ = 256787868.

The previous prime is 513652651. The next prime is 513652679. The reversal of 513652666 is 666256315.

It is a happy number.

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

It is a super-2 number, since 2×513652666² = 527678122577815112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2265 + ... + 32131.

It is an arithmetic number, because the mean of its divisors is an integer number (96324300).

Almost surely, 2^513652666 is an apocalyptic number.

513652666 is a deficient number, since it is larger than the sum of its proper divisors (256941734).

513652666 is a wasteful number, since it uses less digits than its factorization.

513652666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38468.

The product of its digits is 194400, while the sum is 40.

The square root of 513652666 is about 22663.9066800055. The cubic root of 513652666 is about 800.8598390566.

The spelling of 513652666 in words is "five hundred thirteen million, six hundred fifty-two thousand, six hundred sixty-six".