660120066 has 24 divisors (see below), whose sum is σ = 1437755904. Its totient is φ = 218886840.

The previous prime is 660120053. The next prime is 660120067. The reversal of 660120066 is 660021066.

It is not an unprimeable number, because it can be changed into a prime (660120067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92566 + ... + 99441.

It is an arithmetic number, because the mean of its divisors is an integer number (59906496).

Almost surely, 2^660120066 is an apocalyptic number.

660120066 is an abundant number, since it is smaller than the sum of its proper divisors (777635838).

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

660120066 is a wasteful number, since it uses less digits than its factorization.

660120066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192206 (or 192203 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 660120066 is about 25692.8018324199. The cubic root of 660120066 is about 870.7115621362.

The spelling of 660120066 in words is "six hundred sixty million, one hundred twenty thousand, sixty-six".