69664587121 has 2 divisors, whose sum is σ = 69664587122. Its totient is φ = 69664587120.

The previous prime is 69664587007. The next prime is 69664587131. The reversal of 69664587121 is 12178546696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44230716721 + 25433870400 = 210311^2 + 159480^2 .

It is a cyclic number.

It is not a de Polignac number, because 69664587121 - 2⁷ = 69664586993 is a prime.

It is not a weakly prime, because it can be changed into another prime (69664587131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34832293560 + 34832293561.

It is an arithmetic number, because the mean of its divisors is an integer number (34832293561).

Almost surely, 2^69664587121 is an apocalyptic number.

It is an amenable number.

69664587121 is a deficient number, since it is larger than the sum of its proper divisors (1).

69664587121 is an equidigital number, since it uses as much as digits as its factorization.

69664587121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 55.

The spelling of 69664587121 in words is "sixty-nine billion, six hundred sixty-four million, five hundred eighty-seven thousand, one hundred twenty-one".