1665165164 has 24 divisors (see below), whose sum is σ = 3322797408. Its totient is φ = 723329280.

The previous prime is 1665165163. The next prime is 1665165197. The reversal of 1665165164 is 4615615661.

It is not an unprimeable number, because it can be changed into a prime (1665165163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 940952 + ... + 942719.

It is an arithmetic number, because the mean of its divisors is an integer number (138449892).

Almost surely, 2^1665165164 is an apocalyptic number.

It is an amenable number.

1665165164 is a deficient number, since it is larger than the sum of its proper divisors (1657632244).

1665165164 is a wasteful number, since it uses less digits than its factorization.

1665165164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1883705 (or 1883703 counting only the distinct ones).

The product of its digits is 129600, while the sum is 41.

The square root of 1665165164 is about 40806.4353258160. The cubic root of 1665165164 is about 1185.2749488703.

The spelling of 1665165164 in words is "one billion, six hundred sixty-five million, one hundred sixty-five thousand, one hundred sixty-four".