668862858 has 16 divisors (see below), whose sum is σ = 1416415680. Its totient is φ = 209839296.

The previous prime is 668862853. The next prime is 668862863. The reversal of 668862858 is 858268866.

668862858 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (668862853) and next prime (668862863).

It is a junction number, because it is equal to n+sod(n) for n = 668862798 and 668862807.

It is not an unprimeable number, because it can be changed into a prime (668862853) 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, 3278638 + ... + 3278841.

It is an arithmetic number, because the mean of its divisors is an integer number (88525980).

Almost surely, 2^668862858 is an apocalyptic number.

668862858 is an abundant number, since it is smaller than the sum of its proper divisors (747552822).

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

668862858 is a wasteful number, since it uses less digits than its factorization.

668862858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6557501.

The product of its digits is 8847360, while the sum is 57.

The square root of 668862858 is about 25862.3830688512. The cubic root of 668862858 is about 874.5386882071.

The spelling of 668862858 in words is "six hundred sixty-eight million, eight hundred sixty-two thousand, eight hundred fifty-eight".