66018443 has 8 divisors (see below), whose sum is σ = 67616208. Its totient is φ = 64433824.

The previous prime is 66018377. The next prime is 66018451. The reversal of 66018443 is 34481066.

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

It is a cyclic number.

It is not a de Polignac number, because 66018443 - 2²⁰ = 64969867 is a prime.

It is a super-2 number, since 2×66018443² = 8716869632288498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66018493) 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, 7280 + ... + 13602.

It is an arithmetic number, because the mean of its divisors is an integer number (8452026).

Almost surely, 2^66018443 is an apocalyptic number.

66018443 is a deficient number, since it is larger than the sum of its proper divisors (1597765).

66018443 is a wasteful number, since it uses less digits than its factorization.

66018443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6573.

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

The square root of 66018443 is about 8125.1734135340. The cubic root of 66018443 is about 404.1616412785.

The spelling of 66018443 in words is "sixty-six million, eighteen thousand, four hundred forty-three".