116666558 has 4 divisors (see below), whose sum is σ = 174999840. Its totient is φ = 58333278.

The previous prime is 116666533. The next prime is 116666573. The reversal of 116666558 is 855666611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 855666611 = 2897 ⋅295363.

It is a super-2 number, since 2×116666558² = 27222171511134728, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29166638 + ... + 29166641.

It is an arithmetic number, because the mean of its divisors is an integer number (43749960).

Almost surely, 2^116666558 is an apocalyptic number.

116666558 is the 5774-th centered heptagonal number.

116666558 is a deficient number, since it is larger than the sum of its proper divisors (58333282).

116666558 is an equidigital number, since it uses as much as digits as its factorization.

116666558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58333281.

The product of its digits is 259200, while the sum is 44.

The square root of 116666558 is about 10801.2294670561. The cubic root of 116666558 is about 488.6322512506.

The spelling of 116666558 in words is "one hundred sixteen million, six hundred sixty-six thousand, five hundred fifty-eight".