806665065 has 16 divisors (see below), whose sum is σ = 1291251456. Its totient is φ = 430025600.

The previous prime is 806665061. The next prime is 806665091. The reversal of 806665065 is 560566608.

It is not a de Polignac number, because 806665065 - 2² = 806665061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (806665061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25600 + ... + 47630.

It is an arithmetic number, because the mean of its divisors is an integer number (80703216).

Almost surely, 2^806665065 is an apocalyptic number.

It is an amenable number.

806665065 is a deficient number, since it is larger than the sum of its proper divisors (484586391).

806665065 is a wasteful number, since it uses less digits than its factorization.

806665065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24480.

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 806665065 is about 28401.8496756813. The cubic root of 806665065 is about 930.8886811131. Note that the first 3 decimals are identical.

The spelling of 806665065 in words is "eight hundred six million, six hundred sixty-five thousand, sixty-five".