4221365421660 has 48 divisors (see below), whose sum is σ = 11820772454400. Its totient is φ = 1125607038784.

The previous prime is 4221365421659. The next prime is 4221365421703. The reversal of 4221365421660 is 661245631224.

It is a happy number.

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, 2070240 + ... + 3567719.

It is an arithmetic number, because the mean of its divisors is an integer number (246266092800).

Almost surely, 2^{4221365421660} is an apocalyptic number.

It is an amenable number.

4221365421660 is an abundant number, since it is smaller than the sum of its proper divisors (7599407032740).

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

4221365421660 is a wasteful number, since it uses less digits than its factorization.

4221365421660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5650450 (or 5650448 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 4221365421660 in words is "four trillion, two hundred twenty-one billion, three hundred sixty-five million, four hundred twenty-one thousand, six hundred sixty".