6660066 has 16 divisors (see below), whose sum is σ = 15223104. Its totient is φ = 1902864.

The previous prime is 6660061. The next prime is 6660091. The reversal of 6660066 is 6600666.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (6660061) 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, 79245 + ... + 79328.

It is an arithmetic number, because the mean of its divisors is an integer number (951444).

Almost surely, 2^6660066 is an apocalyptic number.

6660066 is an abundant number, since it is smaller than the sum of its proper divisors (8563038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6660066 is a wasteful number, since it uses less digits than its factorization.

6660066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158585.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 6660066 is about 2580.7103673214. The cubic root of 6660066 is about 188.1450706135.

It can be divided in two parts, 66600 and 66, that added together give a palindrome (66666).

The spelling of 6660066 in words is "six million, six hundred sixty thousand, sixty-six".