16661657223147 has 8 divisors (see below), whose sum is σ = 22217297935680. Its totient is φ = 11106893996360.

The previous prime is 16661657223061. The next prime is 16661657223149. The reversal of 16661657223147 is 74132275616661.

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

It is a cyclic number.

It is not a de Polignac number, because 16661657223147 - 2¹⁰ = 16661657222123 is a prime.

It is a super-2 number, since 2×16661657223147² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16661657223149) 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, 219327129 + ... + 219403082.

It is an arithmetic number, because the mean of its divisors is an integer number (2777162241960).

Almost surely, 2^{16661657223147} is an apocalyptic number.

16661657223147 is a deficient number, since it is larger than the sum of its proper divisors (5555640712533).

16661657223147 is a wasteful number, since it uses less digits than its factorization.

16661657223147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438742873.

The product of its digits is 15240960, while the sum is 57.

The spelling of 16661657223147 in words is "sixteen trillion, six hundred sixty-one billion, six hundred fifty-seven million, two hundred twenty-three thousand, one hundred forty-seven".