3661576813 has 2 divisors, whose sum is σ = 3661576814. Its totient is φ = 3661576812.

The previous prime is 3661576759. The next prime is 3661576823. The reversal of 3661576813 is 3186751663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3602640484 + 58936329 = 60022^2 + 7677^2 .

It is a cyclic number.

It is not a de Polignac number, because 3661576813 - 2²⁹ = 3124705901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3661576823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1830788406 + 1830788407.

It is an arithmetic number, because the mean of its divisors is an integer number (1830788407).

Almost surely, 2^3661576813 is an apocalyptic number.

It is an amenable number.

3661576813 is a deficient number, since it is larger than the sum of its proper divisors (1).

3661576813 is an equidigital number, since it uses as much as digits as its factorization.

3661576813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 46.

The square root of 3661576813 is about 60510.9644031559. The cubic root of 3661576813 is about 1541.3078243512.

The spelling of 3661576813 in words is "three billion, six hundred sixty-one million, five hundred seventy-six thousand, eight hundred thirteen".