66210422800 has 60 divisors (see below), whose sum is σ = 162455066496. Its totient is φ = 25920668800.

The previous prime is 66210422797. The next prime is 66210422807. The reversal of 66210422800 is 822401266.

It is not an unprimeable number, because it can be changed into a prime (66210422807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1742116 + ... + 1779715.

Almost surely, 2^66210422800 is an apocalyptic number.

It is an amenable number.

66210422800 is an abundant number, since it is smaller than the sum of its proper divisors (96244643696).

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

66210422800 is a wasteful number, since it uses less digits than its factorization.

66210422800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3521896 (or 3521885 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The spelling of 66210422800 in words is "sixty-six billion, two hundred ten million, four hundred twenty-two thousand, eight hundred".