221020758966 has 48 divisors (see below), whose sum is σ = 521886407616. Its totient is φ = 62206263504.

The previous prime is 221020758961. The next prime is 221020758967. The reversal of 221020758966 is 669857020122.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020758961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5590536 + ... + 5629931.

It is an arithmetic number, because the mean of its divisors is an integer number (10872633492).

Almost surely, 2^221020758966 is an apocalyptic number.

221020758966 is an abundant number, since it is smaller than the sum of its proper divisors (300865648650).

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

221020758966 is a wasteful number, since it uses less digits than its factorization.

221020758966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11220553 (or 11220546 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 221020758966 in words is "two hundred twenty-one billion, twenty million, seven hundred fifty-eight thousand, nine hundred sixty-six".