10166191081 has 2 divisors, whose sum is σ = 10166191082. Its totient is φ = 10166191080.

The previous prime is 10166191073. The next prime is 10166191111. The reversal of 10166191081 is 18019166101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5672499856 + 4493691225 = 75316^2 + 67035^2 .

It is an emirp because it is prime and its reverse (18019166101) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 18016199101 and 10199161081.

It is a cyclic number.

It is not a de Polignac number, because 10166191081 - 2³ = 10166191073 is a prime.

It is a super-2 number, since 2×10166191081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10166191001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5083095540 + 5083095541.

It is an arithmetic number, because the mean of its divisors is an integer number (5083095541).

Almost surely, 2^10166191081 is an apocalyptic number.

It is an amenable number.

10166191081 is a deficient number, since it is larger than the sum of its proper divisors (1).

10166191081 is an equidigital number, since it uses as much as digits as its factorization.

10166191081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 34.

The spelling of 10166191081 in words is "ten billion, one hundred sixty-six million, one hundred ninety-one thousand, eighty-one".