76777373669 has 2 divisors, whose sum is σ = 76777373670. Its totient is φ = 76777373668.

The previous prime is 76777373639. The next prime is 76777373671. The reversal of 76777373669 is 96637377767.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76777205569 + 168100 = 277087^2 + 410^2 .

It is a cyclic number.

It is not a de Polignac number, because 76777373669 - 2²⁴ = 76760596453 is a prime.

It is a super-2 number, since 2×76777373669² (a number of 23 digits) contains 22 as substring.

Together with 76777373671, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 76777373599 and 76777373608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76777373639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38388686834 + 38388686835.

It is an arithmetic number, because the mean of its divisors is an integer number (38388686835).

Almost surely, 2^76777373669 is an apocalyptic number.

It is an amenable number.

76777373669 is a deficient number, since it is larger than the sum of its proper divisors (1).

76777373669 is an equidigital number, since it uses as much as digits as its factorization.

76777373669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 294055272, while the sum is 68.

The spelling of 76777373669 in words is "seventy-six billion, seven hundred seventy-seven million, three hundred seventy-three thousand, six hundred sixty-nine".