3661331663 has 8 divisors (see below), whose sum is σ = 4123024896. Its totient is φ = 3221112600.

The previous prime is 3661331623. The next prime is 3661331669.

3661331663 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3661331663 - 2¹⁸ = 3661069519 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 (3661331669) 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, 5368181 + ... + 5368862.

It is an arithmetic number, because the mean of its divisors is an integer number (515378112).

Almost surely, 2^3661331663 is an apocalyptic number.

3661331663 is a deficient number, since it is larger than the sum of its proper divisors (461693233).

3661331663 is a wasteful number, since it uses less digits than its factorization.

3661331663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10737085.

The product of its digits is 104976, while the sum is 38.

The square root of 3661331663 is about 60508.9387033023. The cubic root of 3661331663 is about 1541.2734256877.

The spelling of 3661331663 in words is "three billion, six hundred sixty-one million, three hundred thirty-one thousand, six hundred sixty-three".