1193466666681 has 45 divisors (see below), whose sum is σ = 1789596930459. Its totient is φ = 766434275712.

The previous prime is 1193466666611. The next prime is 1193466666719. The reversal of 1193466666681 is 1866666643911.

The square root of 1193466666681 is 1092459.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 1020756605625 + 172710061056 = 1010325^2 + 415584^2 .

It is not a de Polignac number, because 1193466666681 - 2¹⁵ = 1193466633913 is a prime.

It is a super-2 number, since 2×1193466666681² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1193466666611) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 2756273841 + ... + 2756274273.

Almost surely, 2^{1193466666681} is an apocalyptic number.

1193466666681 is the 1092459-th square number.

1193466666681 is the 546230-th centered octagonal number.

It is an amenable number.

1193466666681 is a deficient number, since it is larger than the sum of its proper divisors (596130263778).

1193466666681 is an frugal number, since it uses more digits than its factorization.

1193466666681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988 (or 465 counting only the distinct ones).

The product of its digits is 40310784, while the sum is 63.

The spelling of 1193466666681 in words is "one trillion, one hundred ninety-three billion, four hundred sixty-six million, six hundred sixty-six thousand, six hundred eighty-one".