1166537919 has 16 divisors (see below), whose sum is σ = 1568286720. Its totient is φ = 771262560.

The previous prime is 1166537893. The next prime is 1166537923. The reversal of 1166537919 is 9197356611.

It is a happy number.

It is not a de Polignac number, because 1166537919 - 2⁸ = 1166537663 is a prime.

It is a super-2 number, since 2×1166537919² = 2721621432929701122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166537929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237549 + ... + 242409.

It is an arithmetic number, because the mean of its divisors is an integer number (98017920).

Almost surely, 2^1166537919 is an apocalyptic number.

1166537919 is a deficient number, since it is larger than the sum of its proper divisors (401748801).

1166537919 is a wasteful number, since it uses less digits than its factorization.

1166537919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5510.

The product of its digits is 306180, while the sum is 48.

The square root of 1166537919 is about 34154.6178283406. The cubic root of 1166537919 is about 1052.6878735867.

The spelling of 1166537919 in words is "one billion, one hundred sixty-six million, five hundred thirty-seven thousand, nine hundred nineteen".