668664035 has 16 divisors (see below), whose sum is σ = 865038720. Its totient is φ = 493257600.

The previous prime is 668663977. The next prime is 668664047. The reversal of 668664035 is 530466866.

668664035 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 668664035 - 2¹⁰ = 668663011 is a prime.

It is a super-2 number, since 2×668664035² = 894223183404962450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62585 + ... + 72485.

It is an arithmetic number, because the mean of its divisors is an integer number (54064920).

Almost surely, 2^668664035 is an apocalyptic number.

668664035 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

668664035 is a deficient number, since it is larger than the sum of its proper divisors (196374685).

668664035 is a wasteful number, since it uses less digits than its factorization.

668664035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10958.

The product of its (nonzero) digits is 622080, while the sum is 44.

The square root of 668664035 is about 25858.5389185081. The cubic root of 668664035 is about 874.4520258791.

The spelling of 668664035 in words is "six hundred sixty-eight million, six hundred sixty-four thousand, thirty-five".