3331636661 has 4 divisors (see below), whose sum is σ = 3363982752. Its totient is φ = 3299290572.

The previous prime is 3331636631. The next prime is 3331636709. The reversal of 3331636661 is 1666361333.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3331636661 - 2²² = 3327442357 is a prime.

It is a super-2 number, since 2×3331636661² = 22199605681838457842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3331636631) 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, 16172891 + ... + 16173096.

It is an arithmetic number, because the mean of its divisors is an integer number (840995688).

Almost surely, 2^3331636661 is an apocalyptic number.

It is an amenable number.

3331636661 is a deficient number, since it is larger than the sum of its proper divisors (32346091).

3331636661 is a wasteful number, since it uses less digits than its factorization.

3331636661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32346090.

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

The square root of 3331636661 is about 57720.3314352924. The cubic root of 3331636661 is about 1493.5480899899.

Adding to 3331636661 its reverse (1666361333), we get a palindrome (4997997994).

The spelling of 3331636661 in words is "three billion, three hundred thirty-one million, six hundred thirty-six thousand, six hundred sixty-one".