66828250 has 32 divisors (see below), whose sum is σ = 129153024. Its totient is φ = 25866000.

The previous prime is 66828239. The next prime is 66828257. The reversal of 66828250 is 5282866.

It is not an unprimeable number, because it can be changed into a prime (66828257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3439 + ... + 12061.

It is an arithmetic number, because the mean of its divisors is an integer number (4036032).

Almost surely, 2^66828250 is an apocalyptic number.

66828250 is a deficient number, since it is larger than the sum of its proper divisors (62324774).

66828250 is a wasteful number, since it uses less digits than its factorization.

66828250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8671 (or 8661 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 66828250 is about 8174.8547387706. The cubic root of 66828250 is about 405.8074628827.

The spelling of 66828250 in words is "sixty-six million, eight hundred twenty-eight thousand, two hundred fifty".