6660617065 has 32 divisors (see below), whose sum is σ = 8394955776. Its totient is φ = 5066772480.

The previous prime is 6660617059. The next prime is 6660617069. The reversal of 6660617065 is 5607160666.

It is not a de Polignac number, because 6660617065 - 2²¹ = 6658519913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6660617069) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6988629 + ... + 6989581.

It is an arithmetic number, because the mean of its divisors is an integer number (262342368).

Almost surely, 2^6660617065 is an apocalyptic number.

It is an amenable number.

6660617065 is a deficient number, since it is larger than the sum of its proper divisors (1734338711).

6660617065 is a wasteful number, since it uses less digits than its factorization.

6660617065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 6660617065 is about 81612.6035916022. The cubic root of 6660617065 is about 1881.5025961636.

The spelling of 6660617065 in words is "six billion, six hundred sixty million, six hundred seventeen thousand, sixty-five".