65950865 has 4 divisors (see below), whose sum is σ = 79141044. Its totient is φ = 52760688.

The previous prime is 65950861. The next prime is 65950873. The reversal of 65950865 is 56805956.

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 48678529 + 17272336 = 6977^2 + 4156^2 .

It is a cyclic number.

It is not a de Polignac number, because 65950865 - 2² = 65950861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65950861) 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, 6595082 + ... + 6595091.

It is an arithmetic number, because the mean of its divisors is an integer number (19785261).

Almost surely, 2^65950865 is an apocalyptic number.

It is an amenable number.

65950865 is a deficient number, since it is larger than the sum of its proper divisors (13190179).

65950865 is a wasteful number, since it uses less digits than its factorization.

65950865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13190178.

The product of its (nonzero) digits is 324000, while the sum is 44.

The square root of 65950865 is about 8121.0137913933. The cubic root of 65950865 is about 404.0236911408.

The spelling of 65950865 in words is "sixty-five million, nine hundred fifty thousand, eight hundred sixty-five".