16166645 has 16 divisors (see below), whose sum is σ = 21287232. Its totient is φ = 11688960.

The previous prime is 16166641. The next prime is 16166681. The reversal of 16166645 is 54666161.

It is not a de Polignac number, because 16166645 - 2² = 16166641 is a prime.

It is a super-2 number, since 2×16166645² = 522720821112050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16166641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9854 + ... + 11376.

It is an arithmetic number, because the mean of its divisors is an integer number (1330452).

Almost surely, 2^16166645 is an apocalyptic number.

It is an amenable number.

16166645 is a deficient number, since it is larger than the sum of its proper divisors (5120587).

16166645 is a wasteful number, since it uses less digits than its factorization.

16166645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732.

The product of its digits is 25920, while the sum is 35.

The square root of 16166645 is about 4020.7766662674. The cubic root of 16166645 is about 252.8560216485.

It can be divided in two parts, 16 and 166645, that added together give a palindrome (166661).

The spelling of 16166645 in words is "sixteen million, one hundred sixty-six thousand, six hundred forty-five".