660616066 has 8 divisors (see below), whose sum is σ = 1081008144. Its totient is φ = 300280020.

The previous prime is 660616063. The next prime is 660616069.

660616066 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (660616063) and next prime (660616069).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (660616063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15013980 + ... + 15014023.

It is an arithmetic number, because the mean of its divisors is an integer number (135126018).

Almost surely, 2^660616066 is an apocalyptic number.

660616066 is a deficient number, since it is larger than the sum of its proper divisors (420392078).

660616066 is a wasteful number, since it uses less digits than its factorization.

660616066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30028016.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 660616066 is about 25702.4525288930. The cubic root of 660616066 is about 870.9295855108.

It can be divided in two parts, 66061 and 6066, that added together give a palindrome (72127).

The spelling of 660616066 in words is "six hundred sixty million, six hundred sixteen thousand, sixty-six".