77777667701 has 2 divisors, whose sum is σ = 77777667702. Its totient is φ = 77777667700.

The previous prime is 77777667673. The next prime is 77777667703. The reversal of 77777667701 is 10776677777.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73780140625 + 3997527076 = 271625^2 + 63226^2 .

It is a cyclic number.

It is not a de Polignac number, because 77777667701 - 2¹⁸ = 77777405557 is a prime.

Together with 77777667703, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77777667703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38888833850 + 38888833851.

It is an arithmetic number, because the mean of its divisors is an integer number (38888833851).

Almost surely, 2^77777667701 is an apocalyptic number.

It is an amenable number.

77777667701 is a deficient number, since it is larger than the sum of its proper divisors (1).

77777667701 is an equidigital number, since it uses as much as digits as its factorization.

77777667701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29647548, while the sum is 62.

The spelling of 77777667701 in words is "seventy-seven billion, seven hundred seventy-seven million, six hundred sixty-seven thousand, seven hundred one".