3712333661 has 2 divisors, whose sum is σ = 3712333662. Its totient is φ = 3712333660.

The previous prime is 3712333637. The next prime is 3712333687. The reversal of 3712333661 is 1663332173.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2936989636 + 775344025 = 54194^2 + 27845^2 .

It is a cyclic number.

It is not a de Polignac number, because 3712333661 - 2²⁶ = 3645224797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3712333621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1856166830 + 1856166831.

It is an arithmetic number, because the mean of its divisors is an integer number (1856166831).

Almost surely, 2^3712333661 is an apocalyptic number.

It is an amenable number.

3712333661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3712333661 is an equidigital number, since it uses as much as digits as its factorization.

3712333661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 35.

The square root of 3712333661 is about 60928.9230251118. The cubic root of 3712333661 is about 1548.3970471230.

The spelling of 3712333661 in words is "three billion, seven hundred twelve million, three hundred thirty-three thousand, six hundred sixty-one".