677790117779 has 2 divisors, whose sum is σ = 677790117780. Its totient is φ = 677790117778.

The previous prime is 677790117773. The next prime is 677790117799. The reversal of 677790117779 is 977711097776.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 677790117779 - 2²⁸ = 677521682323 is a prime.

It is not a weakly prime, because it can be changed into another prime (677790117773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338895058889 + 338895058890.

It is an arithmetic number, because the mean of its divisors is an integer number (338895058890).

Almost surely, 2^677790117779 is an apocalyptic number.

677790117779 is a deficient number, since it is larger than the sum of its proper divisors (1).

677790117779 is an equidigital number, since it uses as much as digits as its factorization.

677790117779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57177414, while the sum is 68.

The spelling of 677790117779 in words is "six hundred seventy-seven billion, seven hundred ninety million, one hundred seventeen thousand, seven hundred seventy-nine".