1166516220 has 48 divisors (see below), whose sum is σ = 3327881760. Its totient is φ = 305200896.

The previous prime is 1166516207. The next prime is 1166516233. The reversal of 1166516220 is 226156611.

It is an interprime number because it is at equal distance from previous prime (1166516207) and next prime (1166516233).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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, 180235 + ... + 186594.

It is an arithmetic number, because the mean of its divisors is an integer number (69330870).

Almost surely, 2^1166516220 is an apocalyptic number.

1166516220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1166516220 is an abundant number, since it is smaller than the sum of its proper divisors (2161365540).

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

1166516220 is a wasteful number, since it uses less digits than its factorization.

1166516220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366894 (or 366892 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1166516220 is about 34154.3001685000. The cubic root of 1166516220 is about 1052.6813464619.

The spelling of 1166516220 in words is "one billion, one hundred sixty-six million, five hundred sixteen thousand, two hundred twenty".