1166865612 has 24 divisors (see below), whose sum is σ = 2970203712. Its totient is φ = 353595600.

The previous prime is 1166865611. The next prime is 1166865619. The reversal of 1166865612 is 2165686611.

It is not an unprimeable number, because it can be changed into a prime (1166865611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4419814 + ... + 4420077.

It is an arithmetic number, because the mean of its divisors is an integer number (123758488).

Almost surely, 2^1166865612 is an apocalyptic number.

1166865612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1166865612 is an abundant number, since it is smaller than the sum of its proper divisors (1803338100).

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

1166865612 is a wasteful number, since it uses less digits than its factorization.

1166865612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8839909 (or 8839907 counting only the distinct ones).

The product of its digits is 103680, while the sum is 42.

The square root of 1166865612 is about 34159.4146905359. The cubic root of 1166865612 is about 1052.7864347925.

The spelling of 1166865612 in words is "one billion, one hundred sixty-six million, eight hundred sixty-five thousand, six hundred twelve".