66396265 has 32 divisors (see below), whose sum is σ = 89865216. Its totient is φ = 46759680.

The previous prime is 66396259. The next prime is 66396287. The reversal of 66396265 is 56269366.

It is a happy number.

66396265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66396265 - 2⁵ = 66396233 is a prime.

It is a Smith number, since the sum of its digits (43) 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 an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 167047 + ... + 167443.

It is an arithmetic number, because the mean of its divisors is an integer number (2808288).

Almost surely, 2^66396265 is an apocalyptic number.

66396265 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66396265 is a deficient number, since it is larger than the sum of its proper divisors (23468951).

66396265 is a wasteful number, since it uses less digits than its factorization.

66396265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529.

The product of its digits is 349920, while the sum is 43.

The square root of 66396265 is about 8148.3903318386. The cubic root of 66396265 is about 404.9311776568.

The spelling of 66396265 in words is "sixty-six million, three hundred ninety-six thousand, two hundred sixty-five".