666346121326266 has 32 divisors (see below), whose sum is σ = 1334458605283776. Its totient is φ = 221821075872000.

The previous prime is 666346121326241. The next prime is 666346121326307. The reversal of 666346121326266 is 662623121643666.

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, 15829161 + ... + 39790131.

It is an arithmetic number, because the mean of its divisors is an integer number (41701831415118).

Almost surely, 2^{666346121326266} is an apocalyptic number.

666346121326266 is an abundant number, since it is smaller than the sum of its proper divisors (668112483957510).

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

666346121326266 is a wasteful number, since it uses less digits than its factorization.

666346121326266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23967118.

The product of its digits is 80621568, while the sum is 60.

The spelling of 666346121326266 in words is "six hundred sixty-six trillion, three hundred forty-six billion, one hundred twenty-one million, three hundred twenty-six thousand, two hundred sixty-six".