1166506220 has 24 divisors (see below), whose sum is σ = 2672360208. Its totient is φ = 424184000.

The previous prime is 1166506219. The next prime is 1166506259. The reversal of 1166506220 is 226056611.

It is a super-2 number, since 2×1166506220² = 2721473522597376800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2650931 + ... + 2651370.

It is an arithmetic number, because the mean of its divisors is an integer number (111348342).

Almost surely, 2^1166506220 is an apocalyptic number.

1166506220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1166506220 is an abundant number, since it is smaller than the sum of its proper divisors (1505853988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1166506220 is a wasteful number, since it uses less digits than its factorization.

1166506220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5302321 (or 5302319 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1166506220 is about 34154.1537737359. The cubic root of 1166506220 is about 1052.6783384044.

The spelling of 1166506220 in words is "one billion, one hundred sixty-six million, five hundred six thousand, two hundred twenty".