42521624066 has 16 divisors (see below), whose sum is σ = 67629483360. Its totient is φ = 19994798880.

The previous prime is 42521624039. The next prime is 42521624081. The reversal of 42521624066 is 66042612524.

It is a Harshad number since it is a multiple of its sum of digits (38).

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 7 ways as a sum of consecutive naturals, for example, 4078700 + ... + 4089111.

It is an arithmetic number, because the mean of its divisors is an integer number (4226842710).

Almost surely, 2^42521624066 is an apocalyptic number.

42521624066 is a deficient number, since it is larger than the sum of its proper divisors (25107859294).

42521624066 is a wasteful number, since it uses less digits than its factorization.

42521624066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8167969.

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 42521624066 in words is "forty-two billion, five hundred twenty-one million, six hundred twenty-four thousand, sixty-six".