16166155 has 4 divisors (see below), whose sum is σ = 19399392. Its totient is φ = 12932920.

The previous prime is 16166153. The next prime is 16166173. The reversal of 16166155 is 55166161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55166161 = 211 ⋅261451.

It is not a de Polignac number, because 16166155 - 2¹ = 16166153 is a prime.

It is a super-2 number, since 2×16166155² = 522689134968050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16166153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1616611 + ... + 1616620.

It is an arithmetic number, because the mean of its divisors is an integer number (4849848).

Almost surely, 2^16166155 is an apocalyptic number.

16166155 is a deficient number, since it is larger than the sum of its proper divisors (3233237).

16166155 is an equidigital number, since it uses as much as digits as its factorization.

16166155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3233236.

The product of its digits is 5400, while the sum is 31.

The square root of 16166155 is about 4020.7157323044. The cubic root of 16166155 is about 252.8534669914.

The spelling of 16166155 in words is "sixteen million, one hundred sixty-six thousand, one hundred fifty-five".