513252666 has 16 divisors (see below), whose sum is σ = 1140561600. Its totient is φ = 171084204.

The previous prime is 513252617. The next prime is 513252671. The reversal of 513252666 is 666252315.

It is a happy number.

It is a super-2 number, since 2×513252666² = 526856598312215112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 513252666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4752286 + ... + 4752393.

It is an arithmetic number, because the mean of its divisors is an integer number (71285100).

Almost surely, 2^513252666 is an apocalyptic number.

513252666 is an abundant number, since it is smaller than the sum of its proper divisors (627308934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

513252666 is a wasteful number, since it uses less digits than its factorization.

513252666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9504690 (or 9504684 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 513252666 is about 22655.0803573945. The cubic root of 513252666 is about 800.6518988489.

The spelling of 513252666 in words is "five hundred thirteen million, two hundred fifty-two thousand, six hundred sixty-six".