166055109 has 16 divisors (see below), whose sum is σ = 243024384. Its totient is φ = 100018800.

The previous prime is 166055107. The next prime is 166055111. The reversal of 166055109 is 901550661.

It is an interprime number because it is at equal distance from previous prime (166055107) and next prime (166055111).

It is not a de Polignac number, because 166055109 - 2¹ = 166055107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 166055109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166055107) 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, 10057 + ... + 20814.

It is an arithmetic number, because the mean of its divisors is an integer number (15189024).

Almost surely, 2^166055109 is an apocalyptic number.

It is an amenable number.

166055109 is a deficient number, since it is larger than the sum of its proper divisors (76969275).

166055109 is a wasteful number, since it uses less digits than its factorization.

166055109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31048.

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 166055109 is about 12886.2371932229. The cubic root of 166055109 is about 549.6472768721.

The spelling of 166055109 in words is "one hundred sixty-six million, fifty-five thousand, one hundred nine".