660000066 has 24 divisors (see below), whose sum is σ = 1450910832. Its totient is φ = 199999800.

The previous prime is 660000037. The next prime is 660000071.

660000066 is nontrivially palindromic in base 10.

660000066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 453820 + ... + 455271.

It is an arithmetic number, because the mean of its divisors is an integer number (60454618).

Almost surely, 2^660000066 is an apocalyptic number.

660000066 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

660000066 is an abundant number, since it is smaller than the sum of its proper divisors (790910766).

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

660000066 is a wasteful number, since it uses less digits than its factorization.

660000066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909118 (or 909107 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 660000066 is about 25690.4664418535. The cubic root of 660000066 is about 870.6587981393.

It can be divided in two parts, 6600000 and 66, that added together give a palindrome (6600066).

The spelling of 660000066 in words is "six hundred sixty million, sixty-six", and thus it is an aban number.