16661061643132 has 144 divisors (see below), whose sum is σ = 33066455325120. Its totient is φ = 7303715381248.

The previous prime is 16661061643103. The next prime is 16661061643151. The reversal of 16661061643132 is 23134616016661.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1555794594 + ... + 1555805302.

It is an arithmetic number, because the mean of its divisors is an integer number (229628161980).

Almost surely, 2^{16661061643132} is an apocalyptic number.

It is an amenable number.

16661061643132 is a deficient number, since it is larger than the sum of its proper divisors (16405393681988).

16661061643132 is a wasteful number, since it uses less digits than its factorization.

16661061643132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11080 (or 10941 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 46.

Adding to 16661061643132 its reverse (23134616016661), we get a palindrome (39795677659793).

The spelling of 16661061643132 in words is "sixteen trillion, six hundred sixty-one billion, sixty-one million, six hundred forty-three thousand, one hundred thirty-two".