668211063 has 8 divisors (see below), whose sum is σ = 959482608. Its totient is φ = 411206784.

The previous prime is 668211059. The next prime is 668211073. The reversal of 668211063 is 360112866.

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

It is not a de Polignac number, because 668211063 - 2² = 668211059 is a prime.

It is a super-3 number, since 3×668211063³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668211023) 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, 8566770 + ... + 8566847.

It is an arithmetic number, because the mean of its divisors is an integer number (119935326).

Almost surely, 2^668211063 is an apocalyptic number.

668211063 is a deficient number, since it is larger than the sum of its proper divisors (291271545).

668211063 is a wasteful number, since it uses less digits than its factorization.

668211063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17133633.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 668211063 is about 25849.7787804848. The cubic root of 668211063 is about 874.2545217317.

The spelling of 668211063 in words is "six hundred sixty-eight million, two hundred eleven thousand, sixty-three".