111660001 has 4 divisors (see below), whose sum is σ = 111779604. Its totient is φ = 111540400.

The previous prime is 111659987. The next prime is 111660011. The reversal of 111660001 is 100066111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 63218401 + 48441600 = 7951^2 + 6960^2 .

It is a cyclic number.

It is not a de Polignac number, because 111660001 - 2¹⁷ = 111528929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111660011) 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, 58390 + ... + 60271.

It is an arithmetic number, because the mean of its divisors is an integer number (27944901).

Almost surely, 2^111660001 is an apocalyptic number.

It is an amenable number.

111660001 is a deficient number, since it is larger than the sum of its proper divisors (119603).

111660001 is an equidigital number, since it uses as much as digits as its factorization.

111660001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119602.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 111660001 is about 10566.9295918919. The cubic root of 111660001 is about 481.5401929780.

The spelling of 111660001 in words is "one hundred eleven million, six hundred sixty thousand, one".