1166535941 has 2 divisors, whose sum is σ = 1166535942. Its totient is φ = 1166535940.

The previous prime is 1166535857. The next prime is 1166535943. The reversal of 1166535941 is 1495356611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 719044225 + 447491716 = 26815^2 + 21154^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1166535941 is a prime.

It is a super-2 number, since 2×1166535941² = 2721612203289510962, which contains 22 as substring.

Together with 1166535943, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1166535943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583267970 + 583267971.

It is an arithmetic number, because the mean of its divisors is an integer number (583267971).

Almost surely, 2^1166535941 is an apocalyptic number.

It is an amenable number.

1166535941 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166535941 is an equidigital number, since it uses as much as digits as its factorization.

1166535941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 41.

The square root of 1166535941 is about 34154.5888717753. The cubic root of 1166535941 is about 1052.6872786017.

The spelling of 1166535941 in words is "one billion, one hundred sixty-six million, five hundred thirty-five thousand, nine hundred forty-one".