442021665660 has 48 divisors (see below), whose sum is σ = 1266443477376. Its totient is φ = 115131223872.

The previous prime is 442021665619. The next prime is 442021665691. The reversal of 442021665660 is 66566120244.

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 15 ways as a sum of consecutive naturals, for example, 85660534 + ... + 85665693.

It is an arithmetic number, because the mean of its divisors is an integer number (26384239112).

Almost surely, 2^442021665660 is an apocalyptic number.

It is an amenable number.

442021665660 is an abundant number, since it is smaller than the sum of its proper divisors (824421811716).

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

442021665660 is a wasteful number, since it uses less digits than its factorization.

442021665660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171326282 (or 171326280 counting only the distinct ones).

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

The spelling of 442021665660 in words is "four hundred forty-two billion, twenty-one million, six hundred sixty-five thousand, six hundred sixty".