4221066645840 has 160 divisors (see below), whose sum is σ = 14660687834496. Its totient is φ = 995632404480.

The previous prime is 4221066645833. The next prime is 4221066645857. The reversal of 4221066645840 is 485466601224.

4221066645840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 4221066645840.

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, 21508927 + ... + 21704286.

Almost surely, 2^{4221066645840} is an apocalyptic number.

4221066645840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4221066645840 is an abundant number, since it is smaller than the sum of its proper divisors (10439621188656).

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

4221066645840 is a wasteful number, since it uses less digits than its factorization.

4221066645840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43213277 (or 43213271 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 48.

The spelling of 4221066645840 in words is "four trillion, two hundred twenty-one billion, sixty-six million, six hundred forty-five thousand, eight hundred forty".