16660300740021 has 12 divisors (see below), whose sum is σ = 24064979673280. Its totient is φ = 11106820624680.

The previous prime is 16660300740001. The next prime is 16660300740253. The reversal of 16660300740021 is 12004700306661.

It is a happy number.

It is not a de Polignac number, because 16660300740021 - 2²³ = 16660292351413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16660300740001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1536091 + ... + 5973288.

Almost surely, 2^{16660300740021} is an apocalyptic number.

It is an amenable number.

16660300740021 is a deficient number, since it is larger than the sum of its proper divisors (7404678933259).

16660300740021 is a wasteful number, since it uses less digits than its factorization.

16660300740021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7755896 (or 7755893 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 16660300740021 in words is "sixteen trillion, six hundred sixty billion, three hundred million, seven hundred forty thousand, twenty-one".