16661142 has 12 divisors (see below), whose sum is σ = 36099180. Its totient is φ = 5553708.

The previous prime is 16661123. The next prime is 16661143. The reversal of 16661142 is 24116661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16661143) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 462792 + ... + 462827.

It is an arithmetic number, because the mean of its divisors is an integer number (3008265).

Almost surely, 2^16661142 is an apocalyptic number.

16661142 is an abundant number, since it is smaller than the sum of its proper divisors (19438038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16661142 is a wasteful number, since it uses less digits than its factorization.

16661142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925627 (or 925624 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 16661142 is about 4081.8062178403. The cubic root of 16661142 is about 255.4082503175.

The spelling of 16661142 in words is "sixteen million, six hundred sixty-one thousand, one hundred forty-two".