101610066661 has 2 divisors, whose sum is σ = 101610066662. Its totient is φ = 101610066660.

The previous prime is 101610066659. The next prime is 101610066683. The reversal of 101610066661 is 166660016101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88027329636 + 13582737025 = 296694^2 + 116545^2 .

It is a cyclic number.

It is not a de Polignac number, because 101610066661 - 2¹ = 101610066659 is a prime.

Together with 101610066659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101610066601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50805033330 + 50805033331.

It is an arithmetic number, because the mean of its divisors is an integer number (50805033331).

Almost surely, 2^101610066661 is an apocalyptic number.

It is an amenable number.

101610066661 is a deficient number, since it is larger than the sum of its proper divisors (1).

101610066661 is an equidigital number, since it uses as much as digits as its factorization.

101610066661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The spelling of 101610066661 in words is "one hundred one billion, six hundred ten million, sixty-six thousand, six hundred sixty-one".