65865901 has 4 divisors (see below), whose sum is σ = 66346812. Its totient is φ = 65384992.

The previous prime is 65865887. The next prime is 65865923. The reversal of 65865901 is 10956856.

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 23290276 + 42575625 = 4826^2 + 6525^2 .

It is a cyclic number.

It is not a de Polignac number, because 65865901 - 2⁷ = 65865773 is a prime.

It is a Smith number, since the sum of its digits (40) 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65865991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240250 + ... + 240523.

It is an arithmetic number, because the mean of its divisors is an integer number (16586703).

Almost surely, 2^65865901 is an apocalyptic number.

It is an amenable number.

65865901 is a deficient number, since it is larger than the sum of its proper divisors (480911).

65865901 is a wasteful number, since it uses less digits than its factorization.

65865901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480910.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 65865901 is about 8115.7809852164. The cubic root of 65865901 is about 403.8501163604.

It can be divided in two parts, 65865 and 901, that added together give a palindrome (66766).

The spelling of 65865901 in words is "sixty-five million, eight hundred sixty-five thousand, nine hundred one".