668954886 has 12 divisors (see below), whose sum is σ = 1338036492. Its totient is φ = 222963844.

The previous prime is 668954873. The next prime is 668954887. The reversal of 668954886 is 688459866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668954887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58075 + ... + 68633.

It is an arithmetic number, because the mean of its divisors is an integer number (111503041).

Almost surely, 2^668954886 is an apocalyptic number.

668954886 is an abundant number, since it is smaller than the sum of its proper divisors (669081606).

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

668954886 is an frugal number, since it uses more digits than its factorization.

668954886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21123 (or 10564 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 60.

The square root of 668954886 is about 25864.1621940476. The cubic root of 668954886 is about 874.5787952607.

The spelling of 668954886 in words is "six hundred sixty-eight million, nine hundred fifty-four thousand, eight hundred eighty-six".