66200065 has 16 divisors (see below), whose sum is σ = 81144000. Its totient is φ = 51832512.

The previous prime is 66200063. The next prime is 66200081. The reversal of 66200065 is 56000266.

It is a cyclic number.

It is not a de Polignac number, because 66200065 - 2¹ = 66200063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66200063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102634 + ... + 103276.

It is an arithmetic number, because the mean of its divisors is an integer number (5071500).

Almost surely, 2^66200065 is an apocalyptic number.

It is an amenable number.

66200065 is a deficient number, since it is larger than the sum of its proper divisors (14943935).

66200065 is a wasteful number, since it uses less digits than its factorization.

66200065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 66200065 is about 8136.3422371481. The cubic root of 66200065 is about 404.5319288879.

The spelling of 66200065 in words is "sixty-six million, two hundred thousand, sixty-five".