42421055666 has 32 divisors (see below), whose sum is σ = 71650915200. Its totient is φ = 18666806400.

The previous prime is 42421055639. The next prime is 42421055671. The reversal of 42421055666 is 66655012424.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31046 + ... + 292926.

It is an arithmetic number, because the mean of its divisors is an integer number (2239091100).

Almost surely, 2^42421055666 is an apocalyptic number.

42421055666 is a deficient number, since it is larger than the sum of its proper divisors (29229859534).

42421055666 is a wasteful number, since it uses less digits than its factorization.

42421055666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262130.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 42421055666 in words is "forty-two billion, four hundred twenty-one million, fifty-five thousand, six hundred sixty-six".