691411790767 has 2 divisors, whose sum is σ = 691411790768. Its totient is φ = 691411790766.

The previous prime is 691411790717. The next prime is 691411790791. The reversal of 691411790767 is 767097114196.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 691411790767 - 2⁷ = 691411790639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (691411790717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345705895383 + 345705895384.

It is an arithmetic number, because the mean of its divisors is an integer number (345705895384).

Almost surely, 2^691411790767 is an apocalyptic number.

691411790767 is a deficient number, since it is larger than the sum of its proper divisors (1).

691411790767 is an equidigital number, since it uses as much as digits as its factorization.

691411790767 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4000752, while the sum is 58.

The spelling of 691411790767 in words is "six hundred ninety-one billion, four hundred eleven million, seven hundred ninety thousand, seven hundred sixty-seven".