66201623868 has 48 divisors (see below), whose sum is σ = 155382360224. Its totient is φ = 21937029120.

The previous prime is 66201623783. The next prime is 66201623869. The reversal of 66201623868 is 86832610266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66201623869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9068796 + ... + 9076092.

Almost surely, 2^66201623868 is an apocalyptic number.

It is an amenable number.

66201623868 is an abundant number, since it is smaller than the sum of its proper divisors (89180736356).

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

66201623868 is a wasteful number, since it uses less digits than its factorization.

66201623868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11662 (or 11660 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 48.

The spelling of 66201623868 in words is "sixty-six billion, two hundred one million, six hundred twenty-three thousand, eight hundred sixty-eight".