220666865652 has 60 divisors (see below), whose sum is σ = 582578413956. Its totient is φ = 72827337600.

The previous prime is 220666865647. The next prime is 220666865681. The reversal of 220666865652 is 256568666022.

220666865652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 198598574736 + 22068290916 = 445644^2 + 148554^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 3338913 + ... + 3404360.

Almost surely, 2^220666865652 is an apocalyptic number.

It is an amenable number.

220666865652 is an abundant number, since it is smaller than the sum of its proper divisors (361911548304).

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

220666865652 is a wasteful number, since it uses less digits than its factorization.

220666865652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6743390 (or 6743379 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 54.

The spelling of 220666865652 in words is "two hundred twenty billion, six hundred sixty-six million, eight hundred sixty-five thousand, six hundred fifty-two".