111660071 has 4 divisors (see below), whose sum is σ = 111732192. Its totient is φ = 111587952.

The previous prime is 111660061. The next prime is 111660079. The reversal of 111660071 is 170066111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111660071 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 (111660079) 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, 33686 + ... + 36851.

It is an arithmetic number, because the mean of its divisors is an integer number (27933048).

Almost surely, 2^111660071 is an apocalyptic number.

111660071 is a deficient number, since it is larger than the sum of its proper divisors (72121).

111660071 is an equidigital number, since it uses as much as digits as its factorization.

111660071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72120.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 111660071 is about 10566.9329041118. The cubic root of 111660071 is about 481.5402936044.

The spelling of 111660071 in words is "one hundred eleven million, six hundred sixty thousand, seventy-one".