1120666681 has 4 divisors (see below), whose sum is σ = 1121073012. Its totient is φ = 1120260352.

The previous prime is 1120666667. The next prime is 1120666711. The reversal of 1120666681 is 1866660211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1866660211 = 13 ⋅143589247.

It can be written as a sum of positive squares in 2 ways, for example, as 118374400 + 1002292281 = 10880^2 + 31659^2 .

It is a cyclic number.

It is not a de Polignac number, because 1120666681 - 2¹⁷ = 1120535609 is a prime.

It is a super-2 number, since 2×1120666681² = 2511787619807111522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1120666681.

It is not an unprimeable number, because it can be changed into a prime (1120666601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199000 + ... + 204553.

It is an arithmetic number, because the mean of its divisors is an integer number (280268253).

Almost surely, 2^1120666681 is an apocalyptic number.

It is an amenable number.

1120666681 is a deficient number, since it is larger than the sum of its proper divisors (406331).

1120666681 is an equidigital number, since it uses as much as digits as its factorization.

1120666681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406330.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 1120666681 is about 33476.3600321182. The cubic root of 1120666681 is about 1038.7048352821.

The spelling of 1120666681 in words is "one billion, one hundred twenty million, six hundred sixty-six thousand, six hundred eighty-one".