1166516597 has 4 divisors (see below), whose sum is σ = 1171523340. Its totient is φ = 1161509856.

The previous prime is 1166516579. The next prime is 1166516621. The reversal of 1166516597 is 7956156611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7956156611 = 13 ⋅612012047.

It can be written as a sum of positive squares in 2 ways, for example, as 523082641 + 643433956 = 22871^2 + 25366^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166516597 - 2¹⁴ = 1166500213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166506597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2503022 + ... + 2503487.

It is an arithmetic number, because the mean of its divisors is an integer number (292880835).

Almost surely, 2^1166516597 is an apocalyptic number.

It is an amenable number.

1166516597 is a deficient number, since it is larger than the sum of its proper divisors (5006743).

1166516597 is an equidigital number, since it uses as much as digits as its factorization.

1166516597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5006742.

The product of its digits is 340200, while the sum is 47.

The square root of 1166516597 is about 34154.3056875703. The cubic root of 1166516597 is about 1052.6814598653.

The spelling of 1166516597 in words is "one billion, one hundred sixty-six million, five hundred sixteen thousand, five hundred ninety-seven".