660500066 has 8 divisors (see below), whose sum is σ = 1000369344. Its totient is φ = 327043620.

The previous prime is 660500051. The next prime is 660500083. The reversal of 660500066 is 660005066.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1602950 + ... + 1603361.

It is an arithmetic number, because the mean of its divisors is an integer number (125046168).

Almost surely, 2^660500066 is an apocalyptic number.

660500066 is a deficient number, since it is larger than the sum of its proper divisors (339869278).

660500066 is a wasteful number, since it uses less digits than its factorization.

660500066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3206416.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 660500066 is about 25700.1958358297. The cubic root of 660500066 is about 870.8786059525.

It can be divided in two parts, 6605000 and 66, that added together give a palindrome (6605066).

The spelling of 660500066 in words is "six hundred sixty million, five hundred thousand, sixty-six".