666042222164 has 24 divisors (see below), whose sum is σ = 1275178548000. Its totient is φ = 301878989280.

The previous prime is 666042222119. The next prime is 666042222187. The reversal of 666042222164 is 461222240666.

It is a happy number.

It is a super-3 number, since 3×666042222164³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21671354 + ... + 21702065.

It is an arithmetic number, because the mean of its divisors is an integer number (53132439500).

Almost surely, 2^666042222164 is an apocalyptic number.

It is an amenable number.

666042222164 is a deficient number, since it is larger than the sum of its proper divisors (609136325836).

666042222164 is a wasteful number, since it uses less digits than its factorization.

666042222164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43373783 (or 43373781 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 41.

The spelling of 666042222164 in words is "six hundred sixty-six billion, forty-two million, two hundred twenty-two thousand, one hundred sixty-four".