65000066 has 4 divisors (see below), whose sum is σ = 97500102. Its totient is φ = 32500032.

The previous prime is 65000063. The next prime is 65000071. The reversal of 65000066 is 66000056.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 36857041 + 28143025 = 6071^2 + 5305^2 .

It is not an unprimeable number, because it can be changed into a prime (65000063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16250015 + ... + 16250018.

Almost surely, 2^65000066 is an apocalyptic number.

65000066 is a deficient number, since it is larger than the sum of its proper divisors (32500036).

65000066 is a wasteful number, since it uses less digits than its factorization.

65000066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32500035.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 65000066 is about 8062.2618414438. The cubic root of 65000066 is about 402.0727119450.

The spelling of 65000066 in words is "sixty-five million, sixty-six", and thus it is an aban number and an uban number.