20666880063 has 12 divisors (see below), whose sum is σ = 30141988240. Its totient is φ = 13644153216.

The previous prime is 20666880041. The next prime is 20666880109. The reversal of 20666880063 is 36008866602.

It is not a de Polignac number, because 20666880063 - 2¹² = 20666875967 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 (20666880163) 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, 11146258 + ... + 11148111.

Almost surely, 2^20666880063 is an apocalyptic number.

20666880063 is a deficient number, since it is larger than the sum of its proper divisors (9475108177).

20666880063 is a wasteful number, since it uses less digits than its factorization.

20666880063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22294478 (or 22294475 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 20666880063 in words is "twenty billion, six hundred sixty-six million, eight hundred eighty thousand, sixty-three".