1166538473 has 2 divisors, whose sum is σ = 1166538474. Its totient is φ = 1166538472.

The previous prime is 1166538469. The next prime is 1166538491. The reversal of 1166538473 is 3748356611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1164993424 + 1545049 = 34132^2 + 1243^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166538473 - 2² = 1166538469 is a prime.

It is not a weakly prime, because it can be changed into another prime (1166538413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583269236 + 583269237.

It is an arithmetic number, because the mean of its divisors is an integer number (583269237).

Almost surely, 2^1166538473 is an apocalyptic number.

It is an amenable number.

1166538473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166538473 is an equidigital number, since it uses as much as digits as its factorization.

1166538473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 44.

The square root of 1166538473 is about 34154.6259385167. The cubic root of 1166538473 is about 1052.6880402305.

The spelling of 1166538473 in words is "one billion, one hundred sixty-six million, five hundred thirty-eight thousand, four hundred seventy-three".