666142266 has 16 divisors (see below), whose sum is σ = 1357422624. Its totient is φ = 217857744.

The previous prime is 666142259. The next prime is 666142357. The reversal of 666142266 is 662241666.

666142266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×666142266² = 887491037103229512, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1047076 + ... + 1047711.

It is an arithmetic number, because the mean of its divisors is an integer number (84838914).

Almost surely, 2^666142266 is an apocalyptic number.

666142266 is an abundant number, since it is smaller than the sum of its proper divisors (691280358).

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

666142266 is a wasteful number, since it uses less digits than its factorization.

666142266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2094845.

The product of its digits is 124416, while the sum is 39.

The square root of 666142266 is about 25809.7320017082. The cubic root of 666142266 is about 873.3513515632.

The spelling of 666142266 in words is "six hundred sixty-six million, one hundred forty-two thousand, two hundred sixty-six".