3421365661 has 8 divisors (see below), whose sum is σ = 3989931200. Its totient is φ = 2932598844.

The previous prime is 3421365643. The next prime is 3421365697. The reversal of 3421365661 is 1665631243.

It is not a de Polignac number, because 3421365661 - 2⁹ = 3421365149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3421365661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3421365601) 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, 4987071 + ... + 4987756.

It is an arithmetic number, because the mean of its divisors is an integer number (498741400).

Almost surely, 2^3421365661 is an apocalyptic number.

It is an amenable number.

3421365661 is a deficient number, since it is larger than the sum of its proper divisors (568565539).

3421365661 is an frugal number, since it uses more digits than its factorization.

3421365661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9974848 (or 9974834 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The square root of 3421365661 is about 58492.4410586530. The cubic root of 3421365661 is about 1506.8377693916.

The spelling of 3421365661 in words is "three billion, four hundred twenty-one million, three hundred sixty-five thousand, six hundred sixty-one".