74766665609 has 2 divisors, whose sum is σ = 74766665610. Its totient is φ = 74766665608.

The previous prime is 74766665543. The next prime is 74766665629. The reversal of 74766665609 is 90656666747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48578364025 + 26188301584 = 220405^2 + 161828^2 .

It is a cyclic number.

It is not a de Polignac number, because 74766665609 - 2⁸ = 74766665353 is a prime.

It is not a weakly prime, because it can be changed into another prime (74766665629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37383332804 + 37383332805.

It is an arithmetic number, because the mean of its divisors is an integer number (37383332805).

Almost surely, 2^74766665609 is an apocalyptic number.

It is an amenable number.

74766665609 is a deficient number, since it is larger than the sum of its proper divisors (1).

74766665609 is an equidigital number, since it uses as much as digits as its factorization.

74766665609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68584320, while the sum is 62.

The spelling of 74766665609 in words is "seventy-four billion, seven hundred sixty-six million, six hundred sixty-five thousand, six hundred nine".