166872005206 has 32 divisors (see below), whose sum is σ = 252601929216. Its totient is φ = 82676100000.

The previous prime is 166872005173. The next prime is 166872005207. The reversal of 166872005206 is 602500278661.

It is a super-2 number, since 2×166872005206² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166872005207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95847496 + ... + 95849236.

It is an arithmetic number, because the mean of its divisors is an integer number (7893810288).

Almost surely, 2^166872005206 is an apocalyptic number.

166872005206 is a deficient number, since it is larger than the sum of its proper divisors (85729924010).

166872005206 is a wasteful number, since it uses less digits than its factorization.

166872005206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2868.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 166872005206 in words is "one hundred sixty-six billion, eight hundred seventy-two million, five thousand, two hundred six".