66664464200220 has 48 divisors (see below), whose sum is σ = 186661253485728. Its totient is φ = 17777118670080.

The previous prime is 66664464200219. The next prime is 66664464200351. The reversal of 66664464200220 is 2200246446666.

It is a self number, because there is not a number n which added to its sum of digits gives 66664464200220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13672930 + ... + 17896310.

It is an arithmetic number, because the mean of its divisors is an integer number (3888776114286).

Almost surely, 2^{66664464200220} is an apocalyptic number.

66664464200220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66664464200220 is an abundant number, since it is smaller than the sum of its proper divisors (119996789285508).

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

66664464200220 is a wasteful number, since it uses less digits than its factorization.

66664464200220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4486470 (or 4486468 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 48.

The spelling of 66664464200220 in words is "sixty-six trillion, six hundred sixty-four billion, four hundred sixty-four million, two hundred thousand, two hundred twenty".