4165652621 has 16 divisors (see below), whose sum is σ = 4637982720. Its totient is φ = 3715407360.

The previous prime is 4165652599. The next prime is 4165652627. The reversal of 4165652621 is 1262565614.

It is a cyclic number.

It is not a de Polignac number, because 4165652621 - 2¹⁰ = 4165651597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4165652627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263540 + ... + 278898.

It is an arithmetic number, because the mean of its divisors is an integer number (289873920).

Almost surely, 2^4165652621 is an apocalyptic number.

It is an amenable number.

4165652621 is a deficient number, since it is larger than the sum of its proper divisors (472330099).

4165652621 is a wasteful number, since it uses less digits than its factorization.

4165652621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16076.

The product of its digits is 86400, while the sum is 38.

The square root of 4165652621 is about 64541.8671948682. The cubic root of 4165652621 is about 1609.0184237078.

The spelling of 4165652621 in words is "four billion, one hundred sixty-five million, six hundred fifty-two thousand, six hundred twenty-one".