966685869869 has 2 divisors, whose sum is σ = 966685869870. Its totient is φ = 966685869868.

The previous prime is 966685869859. The next prime is 966685869893. The reversal of 966685869869 is 968968586669.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 668695436644 + 297990433225 = 817738^2 + 545885^2 .

It is a cyclic number.

It is not a de Polignac number, because 966685869869 - 2⁸ = 966685869613 is a prime.

It is a super-2 number, since 2×966685869869² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (966685869859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 483342934934 + 483342934935.

It is an arithmetic number, because the mean of its divisors is an integer number (483342934935).

Almost surely, 2^966685869869 is an apocalyptic number.

It is an amenable number.

966685869869 is a deficient number, since it is larger than the sum of its proper divisors (1).

966685869869 is an equidigital number, since it uses as much as digits as its factorization.

966685869869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14511882240, while the sum is 86.

The spelling of 966685869869 in words is "nine hundred sixty-six billion, six hundred eighty-five million, eight hundred sixty-nine thousand, eight hundred sixty-nine".