65065666 has 16 divisors (see below), whose sum is σ = 102155904. Its totient is φ = 31022464.

The previous prime is 65065661. The next prime is 65065669. The reversal of 65065666 is 66656056.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (65065661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14235 + ... + 18241.

It is an arithmetic number, because the mean of its divisors is an integer number (6384744).

Almost surely, 2^65065666 is an apocalyptic number.

65065666 is a deficient number, since it is larger than the sum of its proper divisors (37090238).

65065666 is a wasteful number, since it uses less digits than its factorization.

65065666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4385.

The product of its (nonzero) digits is 194400, while the sum is 40.

The square root of 65065666 is about 8066.3291527187. The cubic root of 65065666 is about 402.2079277140.

The spelling of 65065666 in words is "sixty-five million, sixty-five thousand, six hundred sixty-six".