65526665 has 4 divisors (see below), whose sum is σ = 78632004. Its totient is φ = 52421328.

The previous prime is 65526599. The next prime is 65526673. The reversal of 65526665 is 56662556.

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 14661241 + 50865424 = 3829^2 + 7132^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65526665 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6552662 + ... + 6552671.

It is an arithmetic number, because the mean of its divisors is an integer number (19658001).

Almost surely, 2^65526665 is an apocalyptic number.

It is an amenable number.

65526665 is a deficient number, since it is larger than the sum of its proper divisors (13105339).

65526665 is a wasteful number, since it uses less digits than its factorization.

65526665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13105338.

The product of its digits is 324000, while the sum is 41.

The square root of 65526665 is about 8094.8542296943. The cubic root of 65526665 is about 403.1555922140.

The spelling of 65526665 in words is "sixty-five million, five hundred twenty-six thousand, six hundred sixty-five".