16660025415851 has 8 divisors (see below), whose sum is σ = 16896747871680. Its totient is φ = 16423948861632.

The previous prime is 16660025415773. The next prime is 16660025415863. The reversal of 16660025415851 is 15851452006661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16660025415851 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16660025415851.

It is not an unprimeable number, because it can be changed into a prime (16660025415871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161423450 + ... + 161526623.

It is an arithmetic number, because the mean of its divisors is an integer number (2112093483960).

Almost surely, 2^{16660025415851} is an apocalyptic number.

16660025415851 is a deficient number, since it is larger than the sum of its proper divisors (236722455829).

16660025415851 is an equidigital number, since it uses as much as digits as its factorization.

16660025415851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322950805.

The product of its (nonzero) digits is 1728000, while the sum is 50.

The spelling of 16660025415851 in words is "sixteen trillion, six hundred sixty billion, twenty-five million, four hundred fifteen thousand, eight hundred fifty-one".