3815033661 has 12 divisors (see below), whose sum is σ = 5714700992. Its totient is φ = 2543355612.

The previous prime is 3815033647. The next prime is 3815033689. The reversal of 3815033661 is 1663305183.

It is a happy number.

It is not a de Polignac number, because 3815033661 - 2¹⁷ = 3814902589 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 (3815033611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7849621 + ... + 7850106.

Almost surely, 2^3815033661 is an apocalyptic number.

It is an amenable number.

3815033661 is a deficient number, since it is larger than the sum of its proper divisors (1899667331).

3815033661 is an equidigital number, since it uses as much as digits as its factorization.

3815033661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15699742 (or 15699730 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 3815033661 is about 61765.9587556123. The cubic root of 3815033661 is about 1562.5459278319.

The spelling of 3815033661 in words is "three billion, eight hundred fifteen million, thirty-three thousand, six hundred sixty-one".