66625443 has 8 divisors (see below), whose sum is σ = 98704400. Its totient is φ = 44416944.

The previous prime is 66625423. The next prime is 66625453. The reversal of 66625443 is 34452666.

It is not a de Polignac number, because 66625443 - 2⁶ = 66625379 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66625398 and 66625407.

It is not an unprimeable number, because it can be changed into a prime (66625423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1233778 + ... + 1233831.

It is an arithmetic number, because the mean of its divisors is an integer number (12338050).

Almost surely, 2^66625443 is an apocalyptic number.

66625443 is a deficient number, since it is larger than the sum of its proper divisors (32078957).

66625443 is a wasteful number, since it uses less digits than its factorization.

66625443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2467618 (or 2467612 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 66625443 is about 8162.4409951926. The cubic root of 66625443 is about 405.3965389164.

The spelling of 66625443 in words is "sixty-six million, six hundred twenty-five thousand, four hundred forty-three".