16651220560067 has 16 divisors (see below), whose sum is σ = 16946797539840. Its totient is φ = 16357071642912.

The previous prime is 16651220559947. The next prime is 16651220560087. The reversal of 16651220560067 is 76006502215661.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16651220560067 is a prime.

It is a super-2 number, since 2×16651220560067² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16651220560087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49870484 + ... + 50203262.

It is an arithmetic number, because the mean of its divisors is an integer number (1059174846240).

Almost surely, 2^{16651220560067} is an apocalyptic number.

16651220560067 is a deficient number, since it is larger than the sum of its proper divisors (295576979773).

16651220560067 is a wasteful number, since it uses less digits than its factorization.

16651220560067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334922.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 16651220560067 in words is "sixteen trillion, six hundred fifty-one billion, two hundred twenty million, five hundred sixty thousand, sixty-seven".