111461661 has 12 divisors (see below), whose sum is σ = 161372640. Its totient is φ = 74135880.

The previous prime is 111461629. The next prime is 111461683. The reversal of 111461661 is 166164111.

It is a happy number.

It is not a de Polignac number, because 111461661 - 2⁵ = 111461629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111461621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10155 + ... + 18056.

It is an arithmetic number, because the mean of its divisors is an integer number (13447720).

Almost surely, 2^111461661 is an apocalyptic number.

It is an amenable number.

111461661 is a deficient number, since it is larger than the sum of its proper divisors (49910979).

111461661 is a wasteful number, since it uses less digits than its factorization.

111461661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28656 (or 28653 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 111461661 is about 10557.5404806233. The cubic root of 111461661 is about 481.2549064322.

The spelling of 111461661 in words is "one hundred eleven million, four hundred sixty-one thousand, six hundred sixty-one".