1166786925361 has 8 divisors (see below), whose sum is σ = 1208491165800. Its totient is φ = 1125180698880.

The previous prime is 1166786925349. The next prime is 1166786925377. The reversal of 1166786925361 is 1635296876611.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 282540087025 + 884246838336 = 531545^2 + 940344^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1166786925361 - 2¹⁷ = 1166786794289 is a prime.

It is a super-2 number, since 2×1166786925361² (a number of 25 digits) 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 1166786925361.

It is not an unprimeable number, because it can be changed into a prime (1166786925341) 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, 24479256 + ... + 24526873.

It is an arithmetic number, because the mean of its divisors is an integer number (151061395725).

Almost surely, 2^{1166786925361} is an apocalyptic number.

It is an amenable number.

1166786925361 is a deficient number, since it is larger than the sum of its proper divisors (41704240439).

1166786925361 is an equidigital number, since it uses as much as digits as its factorization.

1166786925361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49006979.

The product of its digits is 19595520, while the sum is 61.

The spelling of 1166786925361 in words is "one trillion, one hundred sixty-six billion, seven hundred eighty-six million, nine hundred twenty-five thousand, three hundred sixty-one".