666764106 has 64 divisors (see below), whose sum is σ = 1452629376. Its totient is φ = 203212800.

The previous prime is 666764069. The next prime is 666764107. The reversal of 666764106 is 601467666.

666764106 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 (666764107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1232196 + ... + 1232736.

It is an arithmetic number, because the mean of its divisors is an integer number (22697334).

Almost surely, 2^666764106 is an apocalyptic number.

666764106 is an abundant number, since it is smaller than the sum of its proper divisors (785865270).

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

666764106 is a wasteful number, since it uses less digits than its factorization.

666764106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887.

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 666764106 is about 25821.7758103505. The cubic root of 666764106 is about 873.6230232120.

The spelling of 666764106 in words is "six hundred sixty-six million, seven hundred sixty-four thousand, one hundred six".