5605774661 has 2 divisors, whose sum is σ = 5605774662. Its totient is φ = 5605774660.

The previous prime is 5605774621. The next prime is 5605774703. The reversal of 5605774661 is 1664775065.

5605774661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5478220225 + 127554436 = 74015^2 + 11294^2 .

It is a cyclic number.

It is not a de Polignac number, because 5605774661 - 2⁶ = 5605774597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5605774621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2802887330 + 2802887331.

It is an arithmetic number, because the mean of its divisors is an integer number (2802887331).

Almost surely, 2^5605774661 is an apocalyptic number.

It is an amenable number.

5605774661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5605774661 is an equidigital number, since it uses as much as digits as its factorization.

5605774661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1058400, while the sum is 47.

The square root of 5605774661 is about 74871.7213706216. The cubic root of 5605774661 is about 1776.4181919612.

The spelling of 5605774661 in words is "five billion, six hundred five million, seven hundred seventy-four thousand, six hundred sixty-one".