66343225 has 12 divisors (see below), whose sum is σ = 88594156. Its totient is φ = 48991680.

The previous prime is 66343223. The next prime is 66343243. The reversal of 66343225 is 52234366.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 22306729 + 44036496 = 4723^2 + 6636^2 .

It is not a de Polignac number, because 66343225 - 2¹ = 66343223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66343223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101742 + ... + 102391.

Almost surely, 2^66343225 is an apocalyptic number.

66343225 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66343225 is a deficient number, since it is larger than the sum of its proper divisors (22250931).

66343225 is a wasteful number, since it uses less digits than its factorization.

66343225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204156 (or 204151 counting only the distinct ones).

The product of its digits is 25920, while the sum is 31.

The square root of 66343225 is about 8145.1350510596. The cubic root of 66343225 is about 404.8233238428.

The spelling of 66343225 in words is "sixty-six million, three hundred forty-three thousand, two hundred twenty-five".