1166006500 has 24 divisors (see below), whose sum is σ = 2546559288. Its totient is φ = 466402400.

The previous prime is 1166006477. The next prime is 1166006539. The reversal of 1166006500 is 56006611.

It can be written as a sum of positive squares in 4 ways, for example, as 257345764 + 908660736 = 16042^2 + 30144^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 1165507 + ... + 1166506.

It is an arithmetic number, because the mean of its divisors is an integer number (106106637).

Almost surely, 2^1166006500 is an apocalyptic number.

1166006500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1166006500 is an abundant number, since it is smaller than the sum of its proper divisors (1380552788).

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

1166006500 is a wasteful number, since it uses less digits than its factorization.

1166006500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2332032 (or 2332020 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1166006500 is about 34146.8373352497. The cubic root of 1166006500 is about 1052.5279978560.

The spelling of 1166006500 in words is "one billion, one hundred sixty-six million, six thousand, five hundred".