66001533666 has 48 divisors (see below), whose sum is σ = 136854307200. Its totient is φ = 21219742656.

The previous prime is 66001533659. The next prime is 66001533709. The reversal of 66001533666 is 66633510066.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5236500 + ... + 5249088.

It is an arithmetic number, because the mean of its divisors is an integer number (2851131400).

Almost surely, 2^66001533666 is an apocalyptic number.

66001533666 is an abundant number, since it is smaller than the sum of its proper divisors (70852773534).

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

66001533666 is a wasteful number, since it uses less digits than its factorization.

66001533666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13691 (or 13662 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 42.

The spelling of 66001533666 in words is "sixty-six billion, one million, five hundred thirty-three thousand, six hundred sixty-six".