166872022005 has 16 divisors (see below), whose sum is σ = 287533330560. Its totient is φ = 82152379968.

The previous prime is 166872022003. The next prime is 166872022021. The reversal of 166872022005 is 500220278661.

It is not a de Polignac number, because 166872022005 - 2¹ = 166872022003 is a prime.

It is a super-4 number, since 4×166872022005⁴ (a number of 46 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166872022003) 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, 427876785 + ... + 427877174.

It is an arithmetic number, because the mean of its divisors is an integer number (17970833160).

Almost surely, 2^166872022005 is an apocalyptic number.

166872022005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166872022005 is a deficient number, since it is larger than the sum of its proper divisors (120661308555).

166872022005 is a wasteful number, since it uses less digits than its factorization.

166872022005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855753980.

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 166872022005 in words is "one hundred sixty-six billion, eight hundred seventy-two million, twenty-two thousand, five".