66421446366 has 16 divisors (see below), whose sum is σ = 144919519488. Its totient is φ = 20127711000.

The previous prime is 66421446353. The next prime is 66421446391. The reversal of 66421446366 is 66364412466.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 503192710 + ... + 503192841.

It is an arithmetic number, because the mean of its divisors is an integer number (9057469968).

Almost surely, 2^66421446366 is an apocalyptic number.

66421446366 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

66421446366 is an abundant number, since it is smaller than the sum of its proper divisors (78498073122).

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

66421446366 is a wasteful number, since it uses less digits than its factorization.

66421446366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006385567.

The product of its digits is 2985984, while the sum is 48.

The spelling of 66421446366 in words is "sixty-six billion, four hundred twenty-one million, four hundred forty-six thousand, three hundred sixty-six".