9166681 has 2 divisors, whose sum is σ = 9166682. Its totient is φ = 9166680.

The previous prime is 9166667. The next prime is 9166687. The reversal of 9166681 is 1866619.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5480281 + 3686400 = 2341^2 + 1920^2 .

It is a cyclic number.

It is not a de Polignac number, because 9166681 - 2⁵ = 9166649 is a prime.

It is a super-2 number, since 2×9166681² = 168056081111522, which contains 22 as substring.

9166681 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9166681.

It is not a weakly prime, because it can be changed into another prime (9166687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4583340 + 4583341.

It is an arithmetic number, because the mean of its divisors is an integer number (4583341).

Almost surely, 2^9166681 is an apocalyptic number.

It is an amenable number.

9166681 is a deficient number, since it is larger than the sum of its proper divisors (1).

9166681 is an equidigital number, since it uses as much as digits as its factorization.

9166681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 37.

The square root of 9166681 is about 3027.6527211687. The cubic root of 9166681 is about 209.2846483556.

The spelling of 9166681 in words is "nine million, one hundred sixty-six thousand, six hundred eighty-one".