513705666 has 8 divisors (see below), whose sum is σ = 1027411344. Its totient is φ = 171235220.

The previous prime is 513705631. The next prime is 513705691. The reversal of 513705666 is 666507315.

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

513705666 is an admirable number.

It is a super-2 number, since 2×513705666² = 527787022561007112, 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, 42808800 + ... + 42808811.

It is an arithmetic number, because the mean of its divisors is an integer number (128426418).

Almost surely, 2^513705666 is an apocalyptic number.

513705666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

513705666 is a wasteful number, since it uses less digits than its factorization.

513705666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85617616.

The product of its (nonzero) digits is 113400, while the sum is 39.

The square root of 513705666 is about 22665.0759098663. The cubic root of 513705666 is about 800.8873830336.

The spelling of 513705666 in words is "five hundred thirteen million, seven hundred five thousand, six hundred sixty-six".