517606668 has 18 divisors (see below), whose sum is σ = 1308394724. Its totient is φ = 172535544.

The previous prime is 517606643. The next prime is 517606669. The reversal of 517606668 is 866606715.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×517606668³ (a number of 27 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (517606669) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7188946 + ... + 7189017.

Almost surely, 2^517606668 is an apocalyptic number.

It is an amenable number.

517606668 is an abundant number, since it is smaller than the sum of its proper divisors (790788056).

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

517606668 is a wasteful number, since it uses less digits than its factorization.

517606668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14377973 (or 14377968 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 517606668 is about 22750.9707045656. The cubic root of 517606668 is about 802.9095449402.

The spelling of 517606668 in words is "five hundred seventeen million, six hundred six thousand, six hundred sixty-eight".