77747351680667 has 2 divisors, whose sum is σ = 77747351680668. Its totient is φ = 77747351680666.

The previous prime is 77747351680639. The next prime is 77747351680717. The reversal of 77747351680667 is 76608615374777.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77747351680667 - 2²⁴ = 77747334903451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77747351680594 and 77747351680603.

It is not a weakly prime, because it can be changed into another prime (77747351680067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38873675840333 + 38873675840334.

It is an arithmetic number, because the mean of its divisors is an integer number (38873675840334).

Almost surely, 2^{77747351680667} is an apocalyptic number.

77747351680667 is a deficient number, since it is larger than the sum of its proper divisors (1).

77747351680667 is an equidigital number, since it uses as much as digits as its factorization.

77747351680667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1742549760, while the sum is 74.

The spelling of 77747351680667 in words is "seventy-seven trillion, seven hundred forty-seven billion, three hundred fifty-one million, six hundred eighty thousand, six hundred sixty-seven".