76685186969 has 2 divisors, whose sum is σ = 76685186970. Its totient is φ = 76685186968.

The previous prime is 76685186959. The next prime is 76685186971. The reversal of 76685186969 is 96968158667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60301186969 + 16384000000 = 245563^2 + 128000^2 .

It is a cyclic number.

It is not a de Polignac number, because 76685186969 - 2¹⁶ = 76685121433 is a prime.

It is a super-2 number, since 2×76685186969² (a number of 23 digits) contains 22 as substring.

Together with 76685186971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (76685186909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38342593484 + 38342593485.

It is an arithmetic number, because the mean of its divisors is an integer number (38342593485).

Almost surely, 2^76685186969 is an apocalyptic number.

It is an amenable number.

76685186969 is a deficient number, since it is larger than the sum of its proper divisors (1).

76685186969 is an equidigital number, since it uses as much as digits as its factorization.

76685186969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 235146240, while the sum is 71.

The spelling of 76685186969 in words is "seventy-six billion, six hundred eighty-five million, one hundred eighty-six thousand, nine hundred sixty-nine".