166156507220006 has 16 divisors (see below), whose sum is σ = 252499240118160. Its totient is φ = 81995866578720.

The previous prime is 166156507219951. The next prime is 166156507220017. The reversal of 166156507220006 is 600022705651661.

It is a Curzon number.

It is a congruent number.

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, 1443125105 + ... + 1443240236.

It is an arithmetic number, because the mean of its divisors is an integer number (15781202507385).

Almost surely, 2^{166156507220006} is an apocalyptic number.

166156507220006 is a deficient number, since it is larger than the sum of its proper divisors (86342732898154).

166156507220006 is a wasteful number, since it uses less digits than its factorization.

166156507220006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2886365719.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 166156507220006 in words is "one hundred sixty-six trillion, one hundred fifty-six billion, five hundred seven million, two hundred twenty thousand, six".