668880886 has 8 divisors (see below), whose sum is σ = 1003664664. Its totient is φ = 334326000.

The previous prime is 668880841. The next prime is 668880887. The reversal of 668880886 is 688088866.

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

It is a super-2 number, since 2×668880886² = 894803279312289992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 668880886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668880887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49720 + ... + 61723.

It is an arithmetic number, because the mean of its divisors is an integer number (125458083).

Almost surely, 2^668880886 is an apocalyptic number.

668880886 is a deficient number, since it is larger than the sum of its proper divisors (334783778).

668880886 is a wasteful number, since it uses less digits than its factorization.

668880886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114446.

The product of its (nonzero) digits is 7077888, while the sum is 58.

The square root of 668880886 is about 25862.7316036029. The cubic root of 668880886 is about 874.5465453443.

The spelling of 668880886 in words is "six hundred sixty-eight million, eight hundred eighty thousand, eight hundred eighty-six".