74663069561 has 2 divisors, whose sum is σ = 74663069562. Its totient is φ = 74663069560.

The previous prime is 74663069549. The next prime is 74663069587. The reversal of 74663069561 is 16596036647.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46554535225 + 28108534336 = 215765^2 + 167656^2 .

It is a cyclic number.

It is not a de Polignac number, because 74663069561 - 2⁶ = 74663069497 is a prime.

It is not a weakly prime, because it can be changed into another prime (74663069531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37331534780 + 37331534781.

It is an arithmetic number, because the mean of its divisors is an integer number (37331534781).

Almost surely, 2^74663069561 is an apocalyptic number.

It is an amenable number.

74663069561 is a deficient number, since it is larger than the sum of its proper divisors (1).

74663069561 is an equidigital number, since it uses as much as digits as its factorization.

74663069561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4898880, while the sum is 53.

The spelling of 74663069561 in words is "seventy-four billion, six hundred sixty-three million, sixty-nine thousand, five hundred sixty-one".