1166500816 has 20 divisors (see below), whose sum is σ = 2433949252. Its totient is φ = 538384896.

The previous prime is 1166500793. The next prime is 1166500847. The reversal of 1166500816 is 6180056611.

It can be written as a sum of positive squares in 2 ways, for example, as 721459600 + 445041216 = 26860^2 + 21096^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2803881 + ... + 2804296.

Almost surely, 2^1166500816 is an apocalyptic number.

1166500816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1166500816 is an abundant number, since it is smaller than the sum of its proper divisors (1267448436).

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

1166500816 is a wasteful number, since it uses less digits than its factorization.

1166500816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5608198 (or 5608192 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 1166500816 is about 34154.0746617442. The cubic root of 1166500816 is about 1052.6767128430.

The spelling of 1166500816 in words is "one billion, one hundred sixty-six million, five hundred thousand, eight hundred sixteen".