668141866 has 32 divisors (see below), whose sum is σ = 1170868608. Its totient is φ = 280046400.

The previous prime is 668141861. The next prime is 668141891.

668141866 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (668141861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114516 + ... + 120208.

It is an arithmetic number, because the mean of its divisors is an integer number (36589644).

Almost surely, 2^668141866 is an apocalyptic number.

668141866 is a deficient number, since it is larger than the sum of its proper divisors (502726742).

668141866 is a wasteful number, since it uses less digits than its factorization.

668141866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5886.

The product of its digits is 331776, while the sum is 46.

The square root of 668141866 is about 25848.4403011091. The cubic root of 668141866 is about 874.2243427050.

The spelling of 668141866 in words is "six hundred sixty-eight million, one hundred forty-one thousand, eight hundred sixty-six".