66001330660 has 12 divisors (see below), whose sum is σ = 138602794428. Its totient is φ = 26400532256.

The previous prime is 66001330649. The next prime is 66001330667. The reversal of 66001330660 is 6603310066.

It can be written as a sum of positive squares in 2 ways, for example, as 50797947456 + 15203383204 = 225384^2 + 123302^2 .

It is not an unprimeable number, because it can be changed into a prime (66001330667) 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, 1650033247 + ... + 1650033286.

It is an arithmetic number, because the mean of its divisors is an integer number (11550232869).

Almost surely, 2^66001330660 is an apocalyptic number.

It is an amenable number.

66001330660 is an abundant number, since it is smaller than the sum of its proper divisors (72601463768).

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

66001330660 is a wasteful number, since it uses less digits than its factorization.

66001330660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3300066542 (or 3300066540 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 31.

The spelling of 66001330660 in words is "sixty-six billion, one million, three hundred thirty thousand, six hundred sixty".