66403244 has 6 divisors (see below), whose sum is σ = 116205684. Its totient is φ = 33201620.

The previous prime is 66403229. The next prime is 66403273. The reversal of 66403244 is 44230466.

It is a happy number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 8300402 + ... + 8300409.

It is an arithmetic number, because the mean of its divisors is an integer number (19367614).

Almost surely, 2^66403244 is an apocalyptic number.

It is an amenable number.

66403244 is a deficient number, since it is larger than the sum of its proper divisors (49802440).

66403244 is a wasteful number, since it uses less digits than its factorization.

66403244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16600815 (or 16600813 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 66403244 is about 8148.8185646755. The cubic root of 66403244 is about 404.9453647785.

The spelling of 66403244 in words is "sixty-six million, four hundred three thousand, two hundred forty-four".