20866006675091 has 8 divisors (see below), whose sum is σ = 20957583894480. Its totient is φ = 20774433449952.

The previous prime is 20866006675079. The next prime is 20866006675099. The reversal of 20866006675091 is 19057660066802.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20866006675091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20866006675099) 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, 9724481 + ... + 11674653.

It is an arithmetic number, because the mean of its divisors is an integer number (2619697986810).

Almost surely, 2^{20866006675091} is an apocalyptic number.

20866006675091 is a deficient number, since it is larger than the sum of its proper divisors (91577219389).

20866006675091 is a wasteful number, since it uses less digits than its factorization.

20866006675091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1997125.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 20866006675091 in words is "twenty trillion, eight hundred sixty-six billion, six million, six hundred seventy-five thousand, ninety-one".