4165665 has 32 divisors (see below), whose sum is σ = 7714560. Its totient is φ = 1880064.

The previous prime is 4165661. The next prime is 4165699. The reversal of 4165665 is 5665614.

It is not a de Polignac number, because 4165665 - 2² = 4165661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4165661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9981 + ... + 10389.

It is an arithmetic number, because the mean of its divisors is an integer number (241080).

Almost surely, 2^4165665 is an apocalyptic number.

It is an amenable number.

4165665 is a deficient number, since it is larger than the sum of its proper divisors (3548895).

4165665 is a wasteful number, since it uses less digits than its factorization.

4165665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521.

The product of its digits is 21600, while the sum is 33.

The square root of 4165665 is about 2040.9960803490. The cubic root of 4165665 is about 160.9020017537.

The spelling of 4165665 in words is "four million, one hundred sixty-five thousand, six hundred sixty-five".