65864905 has 4 divisors (see below), whose sum is σ = 79037892. Its totient is φ = 52691920.

The previous prime is 65864891. The next prime is 65864923. The reversal of 65864905 is 50946856.

65864905 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 can be written as a sum of positive squares in 2 ways, for example, as 32410249 + 33454656 = 5693^2 + 5784^2 .

It is not a de Polignac number, because 65864905 - 2²³ = 57476297 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 6586486 + ... + 6586495.

It is an arithmetic number, because the mean of its divisors is an integer number (19759473).

Almost surely, 2^65864905 is an apocalyptic number.

It is an amenable number.

65864905 is a deficient number, since it is larger than the sum of its proper divisors (13172987).

65864905 is a wasteful number, since it uses less digits than its factorization.

65864905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13172986.

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 65864905 is about 8115.7196230525. The cubic root of 65864905 is about 403.8480807257.

The spelling of 65864905 in words is "sixty-five million, eight hundred sixty-four thousand, nine hundred five".