6660617066 has 16 divisors (see below), whose sum is σ = 10125129600. Its totient is φ = 3285736608.

The previous prime is 6660617059. The next prime is 6660617069. The reversal of 6660617066 is 6607160666.

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 7 ways as a sum of consecutive naturals, for example, 42005 + ... + 122823.

It is an arithmetic number, because the mean of its divisors is an integer number (632820600).

Almost surely, 2^6660617066 is an apocalyptic number.

6660617066 is a deficient number, since it is larger than the sum of its proper divisors (3464512534).

6660617066 is a wasteful number, since it uses less digits than its factorization.

6660617066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81373.

The product of its (nonzero) digits is 326592, while the sum is 44.

The square root of 6660617066 is about 81612.6035977287. The cubic root of 6660617066 is about 1881.5025962578.

The spelling of 6660617066 in words is "six billion, six hundred sixty million, six hundred seventeen thousand, sixty-six".