6900681667679 has 2 divisors, whose sum is σ = 6900681667680. Its totient is φ = 6900681667678.

The previous prime is 6900681667651. The next prime is 6900681667699. The reversal of 6900681667679 is 9767661860096.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6900681667679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6900681667699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3450340833839 + 3450340833840.

It is an arithmetic number, because the mean of its divisors is an integer number (3450340833840).

Almost surely, 2^{6900681667679} is an apocalyptic number.

6900681667679 is a deficient number, since it is larger than the sum of its proper divisors (1).

6900681667679 is an equidigital number, since it uses as much as digits as its factorization.

6900681667679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 246903552, while the sum is 71.

The spelling of 6900681667679 in words is "six trillion, nine hundred billion, six hundred eighty-one million, six hundred sixty-seven thousand, six hundred seventy-nine".