66624522 has 24 divisors (see below), whose sum is σ = 134412768. Its totient is φ = 22015800.

The previous prime is 66624497. The next prime is 66624529. The reversal of 66624522 is 22542666.

66624522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66624529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136563 + ... + 137049.

It is an arithmetic number, because the mean of its divisors is an integer number (5600532).

Almost surely, 2^66624522 is an apocalyptic number.

66624522 is an abundant number, since it is smaller than the sum of its proper divisors (67788246).

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

66624522 is a wasteful number, since it uses less digits than its factorization.

66624522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794 (or 643 counting only the distinct ones).

The product of its digits is 34560, while the sum is 33.

The square root of 66624522 is about 8162.3845780507. The cubic root of 66624522 is about 405.3946709016.

The spelling of 66624522 in words is "sixty-six million, six hundred twenty-four thousand, five hundred twenty-two".