4077566561 has 2 divisors, whose sum is σ = 4077566562. Its totient is φ = 4077566560.

The previous prime is 4077566557. The next prime is 4077566587. The reversal of 4077566561 is 1656657704.

4077566561 is digitally balanced in base 2, 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., 3662670400 + 414896161 = 60520^2 + 20369^2 .

It is a cyclic number.

It is not a de Polignac number, because 4077566561 - 2² = 4077566557 is a prime.

It is not a weakly prime, because it can be changed into another prime (4077566861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2038783280 + 2038783281.

It is an arithmetic number, because the mean of its divisors is an integer number (2038783281).

Almost surely, 2^4077566561 is an apocalyptic number.

It is an amenable number.

4077566561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4077566561 is an equidigital number, since it uses as much as digits as its factorization.

4077566561 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 4077566561 is about 63855.8263669025. The cubic root of 4077566561 is about 1597.5962030389.

The spelling of 4077566561 in words is "four billion, seventy-seven million, five hundred sixty-six thousand, five hundred sixty-one".