66443018 has 8 divisors (see below), whose sum is σ = 99820512. Its totient is φ = 33169516.

The previous prime is 66443017. The next prime is 66443051. The reversal of 66443018 is 81034466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (66443017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24380 + ... + 26967.

It is an arithmetic number, because the mean of its divisors is an integer number (12477564).

Almost surely, 2^66443018 is an apocalyptic number.

66443018 is a deficient number, since it is larger than the sum of its proper divisors (33377494).

66443018 is a wasteful number, since it uses less digits than its factorization.

66443018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51996.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 66443018 is about 8151.2586758120. The cubic root of 66443018 is about 405.0261995956.

The spelling of 66443018 in words is "sixty-six million, four hundred forty-three thousand, eighteen".