1166335221 has 32 divisors (see below), whose sum is σ = 1667248128. Its totient is φ = 723539520.

The previous prime is 1166335217. The next prime is 1166335271. The reversal of 1166335221 is 1225336611.

It is not a de Polignac number, because 1166335221 - 2² = 1166335217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166335211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 585990 + ... + 587976.

It is an arithmetic number, because the mean of its divisors is an integer number (52101504).

Almost surely, 2^1166335221 is an apocalyptic number.

It is an amenable number.

1166335221 is a deficient number, since it is larger than the sum of its proper divisors (500912907).

1166335221 is a wasteful number, since it uses less digits than its factorization.

1166335221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2241.

The product of its digits is 6480, while the sum is 30.

The square root of 1166335221 is about 34151.6503407961. The cubic root of 1166335221 is about 1052.6268982616.

The spelling of 1166335221 in words is "one billion, one hundred sixty-six million, three hundred thirty-five thousand, two hundred twenty-one".