66674445 has 16 divisors (see below), whose sum is σ = 107091072. Its totient is φ = 35422400.

The previous prime is 66674437. The next prime is 66674449. The reversal of 66674445 is 54447666.

It is a happy number.

It is not a de Polignac number, because 66674445 - 2³ = 66674437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66674397 and 66674406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66674449) 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 15 ways as a sum of consecutive naturals, for example, 4506 + ... + 12395.

It is an arithmetic number, because the mean of its divisors is an integer number (6693192).

Almost surely, 2^66674445 is an apocalyptic number.

It is an amenable number.

66674445 is a deficient number, since it is larger than the sum of its proper divisors (40416627).

66674445 is a wasteful number, since it uses less digits than its factorization.

66674445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17172.

The product of its digits is 483840, while the sum is 42.

The square root of 66674445 is about 8165.4421190772. The cubic root of 66674445 is about 405.4959022231.

The spelling of 66674445 in words is "sixty-six million, six hundred seventy-four thousand, four hundred forty-five".