66325544 has 16 divisors (see below), whose sum is σ = 126400020. Its totient is φ = 32618880.

The previous prime is 66325513. The next prime is 66325579. The reversal of 66325544 is 44552366.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 64609444 + 1716100 = 8038^2 + 1310^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67469 + ... + 68444.

Almost surely, 2^66325544 is an apocalyptic number.

It is an amenable number.

66325544 is a deficient number, since it is larger than the sum of its proper divisors (60074476).

66325544 is a wasteful number, since it uses less digits than its factorization.

66325544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135980 (or 135976 counting only the distinct ones).

The product of its digits is 86400, while the sum is 35.

The square root of 66325544 is about 8144.0496069216. The cubic root of 66325544 is about 404.7873577631.

The spelling of 66325544 in words is "sixty-six million, three hundred twenty-five thousand, five hundred forty-four".