16666164 has 36 divisors (see below), whose sum is σ = 42309540. Its totient is φ = 5531520.

The previous prime is 16666163. The next prime is 16666201. The reversal of 16666164 is 46166661.

It can be written as a sum of positive squares in 2 ways, for example, as 6051600 + 10614564 = 2460^2 + 3258^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×16666164² = 555522044949792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16666163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8824 + ... + 10544.

It is an arithmetic number, because the mean of its divisors is an integer number (1175265).

Almost surely, 2^16666164 is an apocalyptic number.

It is an amenable number.

16666164 is an abundant number, since it is smaller than the sum of its proper divisors (25643376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16666164 is a wasteful number, since it uses less digits than its factorization.

16666164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000 (or 1995 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 16666164 is about 4082.4213403322. The cubic root of 16666164 is about 255.4339094506.

The spelling of 16666164 in words is "sixteen million, six hundred sixty-six thousand, one hundred sixty-four".