16660642140 has 60 divisors (see below), whose sum is σ = 52265056536. Its totient is φ = 4442837472.

The previous prime is 16660642123. The next prime is 16660642151. The reversal of 16660642140 is 4124606661.

16660642140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 16660642095 and 16660642104.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5140554 + ... + 5143793.

Almost surely, 2^16660642140 is an apocalyptic number.

16660642140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16660642140 is an abundant number, since it is smaller than the sum of its proper divisors (35604414396).

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

16660642140 is a wasteful number, since it uses less digits than its factorization.

16660642140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10284368 (or 10284357 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 16660642140 in words is "sixteen billion, six hundred sixty million, six hundred forty-two thousand, one hundred forty".