3705255661 has 2 divisors, whose sum is σ = 3705255662. Its totient is φ = 3705255660.

The previous prime is 3705255647. The next prime is 3705255677. The reversal of 3705255661 is 1665525073.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2958272100 + 746983561 = 54390^2 + 27331^2 .

It is an emirp because it is prime and its reverse (1665525073) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3705255661 - 2¹⁵ = 3705222893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3705255601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1852627830 + 1852627831.

It is an arithmetic number, because the mean of its divisors is an integer number (1852627831).

Almost surely, 2^3705255661 is an apocalyptic number.

It is an amenable number.

3705255661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3705255661 is an equidigital number, since it uses as much as digits as its factorization.

3705255661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189000, while the sum is 40.

The square root of 3705255661 is about 60870.8112398710. The cubic root of 3705255661 is about 1547.4123541227.

The spelling of 3705255661 in words is "three billion, seven hundred five million, two hundred fifty-five thousand, six hundred sixty-one".