66200943 has 4 divisors (see below), whose sum is σ = 88267928. Its totient is φ = 44133960.

The previous prime is 66200933. The next prime is 66200947. The reversal of 66200943 is 34900266.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-66200943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66200943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66200947) 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, 11033488 + ... + 11033493.

It is an arithmetic number, because the mean of its divisors is an integer number (22066982).

Almost surely, 2^66200943 is an apocalyptic number.

66200943 is a deficient number, since it is larger than the sum of its proper divisors (22066985).

66200943 is a wasteful number, since it uses less digits than its factorization.

66200943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22066984.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 66200943 is about 8136.3961924184. The cubic root of 66200943 is about 404.5337172923.

The spelling of 66200943 in words is "sixty-six million, two hundred thousand, nine hundred forty-three".