13920166961 has 2 divisors, whose sum is σ = 13920166962. Its totient is φ = 13920166960.

The previous prime is 13920166943. The next prime is 13920166963. The reversal of 13920166961 is 16966102931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8867800561 + 5052366400 = 94169^2 + 71080^2 .

It is a cyclic number.

It is not a de Polignac number, because 13920166961 - 2¹⁴ = 13920150577 is a prime.

Together with 13920166963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13920166963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6960083480 + 6960083481.

It is an arithmetic number, because the mean of its divisors is an integer number (6960083481).

Almost surely, 2^13920166961 is an apocalyptic number.

It is an amenable number.

13920166961 is a deficient number, since it is larger than the sum of its proper divisors (1).

13920166961 is an equidigital number, since it uses as much as digits as its factorization.

13920166961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 44.

The spelling of 13920166961 in words is "thirteen billion, nine hundred twenty million, one hundred sixty-six thousand, nine hundred sixty-one".