75566789689 has 2 divisors, whose sum is σ = 75566789690. Its totient is φ = 75566789688.

The previous prime is 75566789681. The next prime is 75566789707. The reversal of 75566789689 is 98698766557.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75400766464 + 166023225 = 274592^2 + 12885^2 .

It is a cyclic number.

It is not a de Polignac number, because 75566789689 - 2³ = 75566789681 is a prime.

It is not a weakly prime, because it can be changed into another prime (75566789681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37783394844 + 37783394845.

It is an arithmetic number, because the mean of its divisors is an integer number (37783394845).

Almost surely, 2^75566789689 is an apocalyptic number.

It is an amenable number.

75566789689 is a deficient number, since it is larger than the sum of its proper divisors (1).

75566789689 is an equidigital number, since it uses as much as digits as its factorization.

75566789689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1371686400, while the sum is 76.

The spelling of 75566789689 in words is "seventy-five billion, five hundred sixty-six million, seven hundred eighty-nine thousand, six hundred eighty-nine".