172213107666 has 16 divisors (see below), whose sum is σ = 344693021088. Its totient is φ = 57359901600.

The previous prime is 172213107559. The next prime is 172213107673. The reversal of 172213107666 is 666701312271.

It is a happy number.

172213107666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 11108515 + ... + 11124006.

It is an arithmetic number, because the mean of its divisors is an integer number (21543313818).

Almost surely, 2^172213107666 is an apocalyptic number.

172213107666 is an abundant number, since it is smaller than the sum of its proper divisors (172479913422).

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

172213107666 is a wasteful number, since it uses less digits than its factorization.

172213107666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22233817.

The product of its (nonzero) digits is 127008, while the sum is 42.

The spelling of 172213107666 in words is "one hundred seventy-two billion, two hundred thirteen million, one hundred seven thousand, six hundred sixty-six".