66328626 has 128 divisors (see below), whose sum is σ = 174182400. Its totient is φ = 16369920.

The previous prime is 66328589. The next prime is 66328643. The reversal of 66328626 is 62682366.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 934171 + ... + 934241.

It is an arithmetic number, because the mean of its divisors is an integer number (1360800).

Almost surely, 2^66328626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66328626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87091200).

66328626 is an abundant number, since it is smaller than the sum of its proper divisors (107853774).

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

66328626 is a wasteful number, since it uses less digits than its factorization.

66328626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184.

The product of its digits is 124416, while the sum is 39.

The square root of 66328626 is about 8144.2388226279. The cubic root of 66328626 is about 404.7936275211.

The spelling of 66328626 in words is "sixty-six million, three hundred twenty-eight thousand, six hundred twenty-six".