20665567006 has 24 divisors (see below), whose sum is σ = 36410075856. Its totient is φ = 8617294080.

The previous prime is 20665567001. The next prime is 20665567009. The reversal of 20665567006 is 60076556602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20665567001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 519955 + ... + 558286.

It is an arithmetic number, because the mean of its divisors is an integer number (1517086494).

Almost surely, 2^20665567006 is an apocalyptic number.

20665567006 is a deficient number, since it is larger than the sum of its proper divisors (15744508850).

20665567006 is a wasteful number, since it uses less digits than its factorization.

20665567006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078324 (or 1078287 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 43.

The spelling of 20665567006 in words is "twenty billion, six hundred sixty-five million, five hundred sixty-seven thousand, six".