110001661 has 8 divisors (see below), whose sum is σ = 137145024. Its totient is φ = 85715520.

The previous prime is 110001653. The next prime is 110001673. The reversal of 110001661 is 166100011.

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

It is not a de Polignac number, because 110001661 - 2³ = 110001653 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 (110001061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 714220 + ... + 714373.

It is an arithmetic number, because the mean of its divisors is an integer number (17143128).

Almost surely, 2^110001661 is an apocalyptic number.

110001661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

110001661 is a deficient number, since it is larger than the sum of its proper divisors (27143363).

110001661 is a wasteful number, since it uses less digits than its factorization.

110001661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428611.

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

The square root of 110001661 is about 10488.1676664706. The cubic root of 110001661 is about 479.1443973755.

Adding to 110001661 its reverse (166100011), we get a palindrome (276101672).

The spelling of 110001661 in words is "one hundred ten million, one thousand, six hundred sixty-one".