3665761213 has 2 divisors, whose sum is σ = 3665761214. Its totient is φ = 3665761212.

The previous prime is 3665761171. The next prime is 3665761243. The reversal of 3665761213 is 3121675663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3616579044 + 49182169 = 60138^2 + 7013^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3665761213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3665761243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1832880606 + 1832880607.

It is an arithmetic number, because the mean of its divisors is an integer number (1832880607).

Almost surely, 2^3665761213 is an apocalyptic number.

It is an amenable number.

3665761213 is a deficient number, since it is larger than the sum of its proper divisors (1).

3665761213 is an equidigital number, since it uses as much as digits as its factorization.

3665761213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 40.

The square root of 3665761213 is about 60545.5300827402. The cubic root of 3665761213 is about 1541.8947293530.

The spelling of 3665761213 in words is "three billion, six hundred sixty-five million, seven hundred sixty-one thousand, two hundred thirteen".