115966 has 8 divisors (see below), whose sum is σ = 181584. Its totient is φ = 55440.

The previous prime is 115963. The next prime is 115979. The reversal of 115966 is 669511.

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

It is a super-2 number, since 2×115966² = 26896226312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115963) 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, 1215 + ... + 1306.

It is an arithmetic number, because the mean of its divisors is an integer number (22698).

2¹¹⁵⁹⁶⁶ is an apocalyptic number.

115966 is a deficient number, since it is larger than the sum of its proper divisors (65618).

115966 is a wasteful number, since it uses less digits than its factorization.

115966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2546.

The product of its digits is 1620, while the sum is 28.

The square root of 115966 is about 340.5378099419. The cubic root of 115966 is about 48.7652242611.

It can be divided in two parts, 1159 and 66, that added together give a triangular number (1225 = T₄₉).

The spelling of 115966 in words is "one hundred fifteen thousand, nine hundred sixty-six".