3775225661 has 2 divisors, whose sum is σ = 3775225662. Its totient is φ = 3775225660.

The previous prime is 3775225637. The next prime is 3775225687. The reversal of 3775225661 is 1665225773.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2190708025 + 1584517636 = 46805^2 + 39806^2 .

It is an emirp because it is prime and its reverse (1665225773) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3775225661 - 2²² = 3771031357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3775225361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1887612830 + 1887612831.

It is an arithmetic number, because the mean of its divisors is an integer number (1887612831).

Almost surely, 2^3775225661 is an apocalyptic number.

It is an amenable number.

3775225661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3775225661 is an equidigital number, since it uses as much as digits as its factorization.

3775225661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529200, while the sum is 44.

The square root of 3775225661 is about 61442.8650129533. The cubic root of 3775225661 is about 1557.0921149003.

The spelling of 3775225661 in words is "three billion, seven hundred seventy-five million, two hundred twenty-five thousand, six hundred sixty-one".