1166022491 has 8 divisors (see below), whose sum is σ = 1170699264. Its totient is φ = 1161354600.

The previous prime is 1166022461. The next prime is 1166022497. The reversal of 1166022491 is 1942206611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1166022491 - 2⁶ = 1166022427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1166022497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 384206 + ... + 387228.

It is an arithmetic number, because the mean of its divisors is an integer number (146337408).

Almost surely, 2^1166022491 is an apocalyptic number.

1166022491 is a deficient number, since it is larger than the sum of its proper divisors (4676773).

1166022491 is a wasteful number, since it uses less digits than its factorization.

1166022491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4441.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 1166022491 is about 34147.0714849751. The cubic root of 1166022491 is about 1052.5328094067.

The spelling of 1166022491 in words is "one billion, one hundred sixty-six million, twenty-two thousand, four hundred ninety-one".