220666446420 has 96 divisors (see below), whose sum is σ = 706241894400. Its totient is φ = 50430240384.

The previous prime is 220666446397. The next prime is 220666446433. The reversal of 220666446420 is 24644666022.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2936071 + ... + 3010289.

It is an arithmetic number, because the mean of its divisors is an integer number (7356686400).

Almost surely, 2^220666446420 is an apocalyptic number.

220666446420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220666446420 is an abundant number, since it is smaller than the sum of its proper divisors (485575447980).

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

220666446420 is a wasteful number, since it uses less digits than its factorization.

220666446420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81317 (or 81315 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 220666446420 in words is "two hundred twenty billion, six hundred sixty-six million, four hundred forty-six thousand, four hundred twenty".