660766667066 has 12 divisors (see below), whose sum is σ = 1089445868826. Its totient is φ = 300348484920.

The previous prime is 660766667059. The next prime is 660766667083.

It is a happy number.

660766667066 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 573762315841 + 87004351225 = 757471^2 + 294965^2 .

It is a super-2 number, since 2×660766667066² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1365220145 + ... + 1365220628.

Almost surely, 2^660766667066 is an apocalyptic number.

660766667066 is a deficient number, since it is larger than the sum of its proper divisors (428679201760).

660766667066 is a wasteful number, since it uses less digits than its factorization.

660766667066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730440797 (or 2730440786 counting only the distinct ones).

The product of its (nonzero) digits is 82301184, while the sum is 62.

The spelling of 660766667066 in words is "six hundred sixty billion, seven hundred sixty-six million, six hundred sixty-seven thousand, sixty-six".