1665000165 has 16 divisors (see below), whose sum is σ = 2677392000. Its totient is φ = 883536192.

The previous prime is 1665000157. The next prime is 1665000263. The reversal of 1665000165 is 5610005661.

It is not a de Polignac number, because 1665000165 - 2³ = 1665000157 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275910 + ... + 281879.

It is an arithmetic number, because the mean of its divisors is an integer number (167337000).

Almost surely, 2^1665000165 is an apocalyptic number.

1665000165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1665000165 is a deficient number, since it is larger than the sum of its proper divisors (1012391835).

1665000165 is a wasteful number, since it uses less digits than its factorization.

1665000165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557996.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 1665000165 is about 40804.4135480465. The cubic root of 1665000165 is about 1185.2357984714.

The spelling of 1665000165 in words is "one billion, six hundred sixty-five million, one hundred sixty-five", and thus it is an aban number.