1666164 has 24 divisors (see below), whose sum is σ = 3979360. Its totient is φ = 542304.

The previous prime is 1666151. The next prime is 1666177. The reversal of 1666164 is 4616661.

It is an interprime number because it is at equal distance from previous prime (1666151) and next prime (1666177).

It is a super-2 number, since 2×1666164² = 5552204949792, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1099 + ... + 2130.

2^1666164 is an apocalyptic number.

It is an amenable number.

1666164 is an abundant number, since it is smaller than the sum of its proper divisors (2313196).

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

1666164 is a wasteful number, since it uses less digits than its factorization.

1666164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3279 (or 3277 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 1666164 is about 1290.7997520917. The cubic root of 1666164 is about 118.5511894065.

It can be divided in two parts, 1666 and 164, that added together give a triangular number (1830 = T₆₀).

The spelling of 1666164 in words is "one million, six hundred sixty-six thousand, one hundred sixty-four".