111660166 has 4 divisors (see below), whose sum is σ = 167490252. Its totient is φ = 55830082.

The previous prime is 111660163. The next prime is 111660173. The reversal of 111660166 is 661066111.

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

It is a super-2 number, since 2×111660166² = 24935985342295112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111660163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27915040 + ... + 27915043.

It is an arithmetic number, because the mean of its divisors is an integer number (41872563).

Almost surely, 2^111660166 is an apocalyptic number.

111660166 is a deficient number, since it is larger than the sum of its proper divisors (55830086).

111660166 is an equidigital number, since it uses as much as digits as its factorization.

111660166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55830085.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 111660166 is about 10566.9373992657. The cubic root of 111660166 is about 481.5404301686.

The spelling of 111660166 in words is "one hundred eleven million, six hundred sixty thousand, one hundred sixty-six".