668552563 has 8 divisors (see below), whose sum is σ = 804273920. Its totient is φ = 542884680.

The previous prime is 668552561. The next prime is 668552567. The reversal of 668552563 is 365255866.

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

It is a cyclic number.

It is not a de Polignac number, because 668552563 - 2¹ = 668552561 is a prime.

It is a super-3 number, since 3×668552563³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668552561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2513223 + ... + 2513488.

It is an arithmetic number, because the mean of its divisors is an integer number (100534240).

Almost surely, 2^668552563 is an apocalyptic number.

668552563 is a deficient number, since it is larger than the sum of its proper divisors (135721357).

668552563 is a wasteful number, since it uses less digits than its factorization.

668552563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5026737.

The product of its digits is 1296000, while the sum is 46.

The square root of 668552563 is about 25856.3834091313. The cubic root of 668552563 is about 874.4034303072.

The spelling of 668552563 in words is "six hundred sixty-eight million, five hundred fifty-two thousand, five hundred sixty-three".