668069563 has 8 divisors (see below), whose sum is σ = 765182432. Its totient is φ = 571375296.

The previous prime is 668069533. The next prime is 668069579. The reversal of 668069563 is 365960866.

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 668069563 - 2⁵ = 668069531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (668069503) 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, 101220 + ... + 107617.

It is an arithmetic number, because the mean of its divisors is an integer number (95647804).

Almost surely, 2^668069563 is an apocalyptic number.

668069563 is a deficient number, since it is larger than the sum of its proper divisors (97112869).

668069563 is a wasteful number, since it uses less digits than its factorization.

668069563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209301.

The product of its (nonzero) digits is 1399680, while the sum is 49.

The square root of 668069563 is about 25847.0416682451. The cubic root of 668069563 is about 874.1928068261.

The spelling of 668069563 in words is "six hundred sixty-eight million, sixty-nine thousand, five hundred sixty-three".