66200789 has 4 divisors (see below), whose sum is σ = 66262560. Its totient is φ = 66139020.

The previous prime is 66200767. The next prime is 66200801. The reversal of 66200789 is 98700266.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66200789 - 2¹² = 66196693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66200749) 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, 29249 + ... + 31430.

It is an arithmetic number, because the mean of its divisors is an integer number (16565640).

Almost surely, 2^66200789 is an apocalyptic number.

It is an amenable number.

66200789 is a deficient number, since it is larger than the sum of its proper divisors (61771).

66200789 is a wasteful number, since it uses less digits than its factorization.

66200789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61770.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 66200789 is about 8136.3867287636. The cubic root of 66200789 is about 404.5334036098.

The spelling of 66200789 in words is "sixty-six million, two hundred thousand, seven hundred eighty-nine".