66351250 has 40 divisors (see below), whose sum is σ = 142154496. Its totient is φ = 22746000.

The previous prime is 66351247. The next prime is 66351281. The reversal of 66351250 is 5215366.

66351250 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 19 ways as a sum of consecutive naturals, for example, 4959 + ... + 12541.

Almost surely, 2^66351250 is an apocalyptic number.

66351250 is an abundant number, since it is smaller than the sum of its proper divisors (75803246).

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

66351250 is an equidigital number, since it uses as much as digits as its factorization.

66351250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7612 (or 7597 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 66351250 is about 8145.6276615126. The cubic root of 66351250 is about 404.8396459123.

The spelling of 66351250 in words is "sixty-six million, three hundred fifty-one thousand, two hundred fifty".