76666666597 has 2 divisors, whose sum is σ = 76666666598. Its totient is φ = 76666666596.

The previous prime is 76666666579. The next prime is 76666666673. The reversal of 76666666597 is 79566666667.

Together with previous prime (76666666579) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74987797921 + 1678868676 = 273839^2 + 40974^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76666666597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76666660597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38333333298 + 38333333299.

It is an arithmetic number, because the mean of its divisors is an integer number (38333333299).

Almost surely, 2^76666666597 is an apocalyptic number.

It is an amenable number.

76666666597 is a deficient number, since it is larger than the sum of its proper divisors (1).

76666666597 is an equidigital number, since it uses as much as digits as its factorization.

76666666597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 617258880, while the sum is 70.

Adding to 76666666597 its sum of digits (70), we get a palindrome (76666666667).

The spelling of 76666666597 in words is "seventy-six billion, six hundred sixty-six million, six hundred sixty-six thousand, five hundred ninety-seven".