668235532866 has 64 divisors (see below), whose sum is σ = 1468649232000. Its totient is φ = 201013836800.

The previous prime is 668235532817. The next prime is 668235532873.

668235532866 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×668235532866³ (a number of 36 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16786426 + ... + 16826186.

It is an arithmetic number, because the mean of its divisors is an integer number (22947644250).

Almost surely, 2^668235532866 is an apocalyptic number.

668235532866 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

668235532866 is an abundant number, since it is smaller than the sum of its proper divisors (800413699134).

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

668235532866 is a wasteful number, since it uses less digits than its factorization.

668235532866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41635.

The product of its digits is 74649600, while the sum is 60.

The spelling of 668235532866 in words is "six hundred sixty-eight billion, two hundred thirty-five million, five hundred thirty-two thousand, eight hundred sixty-six".