65066251 has 4 divisors (see below), whose sum is σ = 65407104. Its totient is φ = 64725400.

The previous prime is 65066249. The next prime is 65066257. The reversal of 65066251 is 15266056.

65066251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 65066251 - 2¹ = 65066249 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65066257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170140 + ... + 170521.

It is an arithmetic number, because the mean of its divisors is an integer number (16351776).

Almost surely, 2^65066251 is an apocalyptic number.

65066251 is a deficient number, since it is larger than the sum of its proper divisors (340853).

65066251 is a wasteful number, since it uses less digits than its factorization.

65066251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340852.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 65066251 is about 8066.3654144850. The cubic root of 65066251 is about 402.2091331164.

The spelling of 65066251 in words is "sixty-five million, sixty-six thousand, two hundred fifty-one".