1140661665 has 96 divisors (see below), whose sum is σ = 2459673216. Its totient is φ = 480430080.

The previous prime is 1140661657. The next prime is 1140661673. The reversal of 1140661665 is 5661660411.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1140661657) and next prime (1140661673).

It is not a de Polignac number, because 1140661665 - 2³ = 1140661657 is a prime.

It is a super-2 number, since 2×1140661665² = 2602218068001144450, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 104182 + ... + 114608.

It is an arithmetic number, because the mean of its divisors is an integer number (25621596).

Almost surely, 2^1140661665 is an apocalyptic number.

1140661665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1140661665 is an abundant number, since it is smaller than the sum of its proper divisors (1319011551).

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

1140661665 is a wasteful number, since it uses less digits than its factorization.

1140661665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10479 (or 10476 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1140661665 is about 33773.6830239167. The cubic root of 1140661665 is about 1044.8459942610.

The spelling of 1140661665 in words is "one billion, one hundred forty million, six hundred sixty-one thousand, six hundred sixty-five".