66223588 has 24 divisors (see below), whose sum is σ = 126201600. Its totient is φ = 30286368.

The previous prime is 66223583. The next prime is 66223603. The reversal of 66223588 is 88532266.

It is a self number, because there is not a number n which added to its sum of digits gives 66223588.

It is not an unprimeable number, because it can be changed into a prime (66223583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12820 + ... + 17227.

It is an arithmetic number, because the mean of its divisors is an integer number (5258400).

Almost surely, 2^66223588 is an apocalyptic number.

It is an amenable number.

66223588 is a deficient number, since it is larger than the sum of its proper divisors (59978012).

66223588 is a wasteful number, since it uses less digits than its factorization.

66223588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30099 (or 30097 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 66223588 is about 8137.7876600462. The cubic root of 66223588 is about 404.5798375906.

The spelling of 66223588 in words is "sixty-six million, two hundred twenty-three thousand, five hundred eighty-eight".