16665181138 has 16 divisors (see below), whose sum is σ = 25223567040. Its totient is φ = 8257590000.

The previous prime is 16665181133. The next prime is 16665181147. The reversal of 16665181138 is 83118156661.

It is not an unprimeable number, because it can be changed into a prime (16665181133) 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, 60688 + ... + 192388.

It is an arithmetic number, because the mean of its divisors is an integer number (1576472940).

Almost surely, 2^16665181138 is an apocalyptic number.

16665181138 is a deficient number, since it is larger than the sum of its proper divisors (8558385902).

16665181138 is a wasteful number, since it uses less digits than its factorization.

16665181138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132273.

The product of its digits is 207360, while the sum is 46.

The spelling of 16665181138 in words is "sixteen billion, six hundred sixty-five million, one hundred eighty-one thousand, one hundred thirty-eight".