77420840699 has 2 divisors, whose sum is σ = 77420840700. Its totient is φ = 77420840698.

The previous prime is 77420840617. The next prime is 77420840723. The reversal of 77420840699 is 99604802477.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77420840699 - 2²⁴ = 77404063483 is a prime.

It is not a weakly prime, because it can be changed into another prime (77420240699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38710420349 + 38710420350.

It is an arithmetic number, because the mean of its divisors is an integer number (38710420350).

Almost surely, 2^77420840699 is an apocalyptic number.

77420840699 is a deficient number, since it is larger than the sum of its proper divisors (1).

77420840699 is an equidigital number, since it uses as much as digits as its factorization.

77420840699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6096384, while the sum is 56.

The spelling of 77420840699 in words is "seventy-seven billion, four hundred twenty million, eight hundred forty thousand, six hundred ninety-nine".