13730665691 has 2 divisors, whose sum is σ = 13730665692. Its totient is φ = 13730665690.

The previous prime is 13730665667. The next prime is 13730665709. The reversal of 13730665691 is 19656603731.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13730665691 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (13730665651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6865332845 + 6865332846.

It is an arithmetic number, because the mean of its divisors is an integer number (6865332846).

Almost surely, 2^13730665691 is an apocalyptic number.

13730665691 is a deficient number, since it is larger than the sum of its proper divisors (1).

13730665691 is an equidigital number, since it uses as much as digits as its factorization.

13730665691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 612360, while the sum is 47.

The spelling of 13730665691 in words is "thirteen billion, seven hundred thirty million, six hundred sixty-five thousand, six hundred ninety-one".