20065426566 has 16 divisors (see below), whose sum is σ = 40152255984. Its totient is φ = 6684908384.

The previous prime is 20065426523. The next prime is 20065426567. The reversal of 20065426566 is 66562456002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20065426567) 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 7 ways as a sum of consecutive naturals, for example, 879585 + ... + 902108.

It is an arithmetic number, because the mean of its divisors is an integer number (2509515999).

Almost surely, 2^20065426566 is an apocalyptic number.

20065426566 is an abundant number, since it is smaller than the sum of its proper divisors (20086829418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20065426566 is a wasteful number, since it uses less digits than its factorization.

20065426566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783575.

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 20065426566 in words is "twenty billion, sixty-five million, four hundred twenty-six thousand, five hundred sixty-six".