111666542 has 8 divisors (see below), whose sum is σ = 180384456. Its totient is φ = 51538392.

The previous prime is 111666479. The next prime is 111666551. The reversal of 111666542 is 245666111.

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

It is a junction number, because it is equal to n+sod(n) for n = 111666499 and 111666508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2147408 + ... + 2147459.

It is an arithmetic number, because the mean of its divisors is an integer number (22548057).

Almost surely, 2^111666542 is an apocalyptic number.

111666542 is a deficient number, since it is larger than the sum of its proper divisors (68717914).

111666542 is a wasteful number, since it uses less digits than its factorization.

111666542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4294882.

The product of its digits is 8640, while the sum is 32.

The square root of 111666542 is about 10567.2390906991. The cubic root of 111666542 is about 481.5495956077.

The spelling of 111666542 in words is "one hundred eleven million, six hundred sixty-six thousand, five hundred forty-two".