101066665691 has 2 divisors, whose sum is σ = 101066665692. Its totient is φ = 101066665690.

The previous prime is 101066665649. The next prime is 101066665697. The reversal of 101066665691 is 196566660101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101066665691 - 2⁶ = 101066665627 is a prime.

It is not a weakly prime, because it can be changed into another prime (101066665697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50533332845 + 50533332846.

It is an arithmetic number, because the mean of its divisors is an integer number (50533332846).

Almost surely, 2^101066665691 is an apocalyptic number.

101066665691 is a deficient number, since it is larger than the sum of its proper divisors (1).

101066665691 is an equidigital number, since it uses as much as digits as its factorization.

101066665691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 47.

The spelling of 101066665691 in words is "one hundred one billion, sixty-six million, six hundred sixty-five thousand, six hundred ninety-one".