16665090943 has 2 divisors, whose sum is σ = 16665090944. Its totient is φ = 16665090942.

The previous prime is 16665090907. The next prime is 16665090977. The reversal of 16665090943 is 34909056661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16665090943 is a prime.

It is a super-2 number, since 2×16665090943² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16665090983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8332545471 + 8332545472.

It is an arithmetic number, because the mean of its divisors is an integer number (8332545472).

Almost surely, 2^16665090943 is an apocalyptic number.

16665090943 is a deficient number, since it is larger than the sum of its proper divisors (1).

16665090943 is an equidigital number, since it uses as much as digits as its factorization.

16665090943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The spelling of 16665090943 in words is "sixteen billion, six hundred sixty-five million, ninety thousand, nine hundred forty-three".