20663655305667 has 8 divisors (see below), whose sum is σ = 30056225899200. Its totient is φ = 12523427457960.

The previous prime is 20663655305639. The next prime is 20663655305701. The reversal of 20663655305667 is 76650355636602.

It is a happy number.

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

It is not a de Polignac number, because 20663655305667 - 2¹⁶ = 20663655240131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20663655305667.

It is not an unprimeable number, because it can be changed into a prime (20663655306667) 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, 313085686417 + ... + 313085686482.

It is an arithmetic number, because the mean of its divisors is an integer number (3757028237400).

Almost surely, 2^{20663655305667} is an apocalyptic number.

20663655305667 is a deficient number, since it is larger than the sum of its proper divisors (9392570593533).

20663655305667 is a wasteful number, since it uses less digits than its factorization.

20663655305667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626171372913.

The product of its (nonzero) digits is 122472000, while the sum is 60.

The spelling of 20663655305667 in words is "twenty trillion, six hundred sixty-three billion, six hundred fifty-five million, three hundred five thousand, six hundred sixty-seven".