65055665 has 4 divisors (see below), whose sum is σ = 78066804. Its totient is φ = 52044528.

The previous prime is 65055647. The next prime is 65055709. The reversal of 65055665 is 56655056.

It is a happy number.

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 36336784 + 28718881 = 6028^2 + 5359^2 .

It is a cyclic number.

It is not a de Polignac number, because 65055665 - 2¹⁴ = 65039281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6505562 + ... + 6505571.

It is an arithmetic number, because the mean of its divisors is an integer number (19516701).

Almost surely, 2^65055665 is an apocalyptic number.

It is an amenable number.

65055665 is a deficient number, since it is larger than the sum of its proper divisors (13011139).

65055665 is a wasteful number, since it uses less digits than its factorization.

65055665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13011138.

The product of its (nonzero) digits is 135000, while the sum is 38.

The square root of 65055665 is about 8065.7092062633. The cubic root of 65055665 is about 402.1873193664.

The spelling of 65055665 in words is "sixty-five million, fifty-five thousand, six hundred sixty-five".