668086056 has 160 divisors (see below), whose sum is σ = 2149250400. Its totient is φ = 191756160.

The previous prime is 668086039. The next prime is 668086057. The reversal of 668086056 is 650680866.

668086056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (668086057) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 132966 + ... + 137898.

It is an arithmetic number, because the mean of its divisors is an integer number (13432815).

Almost surely, 2^668086056 is an apocalyptic number.

668086056 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668086056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1074625200).

668086056 is an abundant number, since it is smaller than the sum of its proper divisors (1481164344).

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

668086056 is a wasteful number, since it uses less digits than its factorization.

668086056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4981 (or 4968 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 668086056 is about 25847.3607163285. The cubic root of 668086056 is about 874.2000006595.

The spelling of 668086056 in words is "six hundred sixty-eight million, eighty-six thousand, fifty-six".