166154109 has 8 divisors (see below), whose sum is σ = 241678752. Its totient is φ = 100699440.

The previous prime is 166154101. The next prime is 166154119. The reversal of 166154109 is 901451661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166154109 - 2³ = 166154101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 5034973 = 166154109 / (1 + 6 + 6 + 1 + 5 + 4 + 1 + 0 + 9).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 166154109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166154101) by changing a digit.

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, 2517454 + ... + 2517519.

It is an arithmetic number, because the mean of its divisors is an integer number (30209844).

Almost surely, 2^166154109 is an apocalyptic number.

It is an amenable number.

166154109 is a deficient number, since it is larger than the sum of its proper divisors (75524643).

166154109 is a wasteful number, since it uses less digits than its factorization.

166154109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5034987.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 166154109 is about 12890.0779283913. The cubic root of 166154109 is about 549.7564861389.

The spelling of 166154109 in words is "one hundred sixty-six million, one hundred fifty-four thousand, one hundred nine".