1665164 has 6 divisors (see below), whose sum is σ = 2914044. Its totient is φ = 832580.

The previous prime is 1665161. The next prime is 1665173. The reversal of 1665164 is 4615661.

It is a super-2 number, since 2×1665164² = 5545542293792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1665161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208142 + ... + 208149.

It is an arithmetic number, because the mean of its divisors is an integer number (485674).

2^1665164 is an apocalyptic number.

It is an amenable number.

1665164 is a deficient number, since it is larger than the sum of its proper divisors (1248880).

1665164 is a wasteful number, since it uses less digits than its factorization.

1665164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416295 (or 416293 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 1665164 is about 1290.4123372008. The cubic root of 1665164 is about 118.5274672689.

The spelling of 1665164 in words is "one million, six hundred sixty-five thousand, one hundred sixty-four".