3656366321 has 4 divisors (see below), whose sum is σ = 3656492532. Its totient is φ = 3656240112.

The previous prime is 3656366309. The next prime is 3656366359. The reversal of 3656366321 is 1236636563.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1897822096 + 1758544225 = 43564^2 + 41935^2 .

It is a cyclic number.

It is not a de Polignac number, because 3656366321 - 2³⁰ = 2582624497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3656366621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4475 + ... + 85631.

It is an arithmetic number, because the mean of its divisors is an integer number (914123133).

Almost surely, 2^3656366321 is an apocalyptic number.

It is an amenable number.

3656366321 is a deficient number, since it is larger than the sum of its proper divisors (126211).

3656366321 is an equidigital number, since it uses as much as digits as its factorization.

3656366321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126210.

The product of its digits is 349920, while the sum is 41.

The square root of 3656366321 is about 60467.8949608799. The cubic root of 3656366321 is about 1540.5763740389.

The spelling of 3656366321 in words is "three billion, six hundred fifty-six million, three hundred sixty-six thousand, three hundred twenty-one".