66626604 has 96 divisors (see below), whose sum is σ = 199584000. Its totient is φ = 18996480.

The previous prime is 66626537. The next prime is 66626611. The reversal of 66626604 is 40662666.

66626604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 18547 + ... + 21845.

It is an arithmetic number, because the mean of its divisors is an integer number (2079000).

Almost surely, 2^66626604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66626604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99792000).

66626604 is an abundant number, since it is smaller than the sum of its proper divisors (132957396).

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

66626604 is a wasteful number, since it uses less digits than its factorization.

66626604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340 (or 3332 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 66626604 is about 8162.5121133141. The cubic root of 66626604 is about 405.3988936857.

The spelling of 66626604 in words is "sixty-six million, six hundred twenty-six thousand, six hundred four".