66800066652 has 72 divisors (see below), whose sum is σ = 192215237760. Its totient is φ = 19362335520.

The previous prime is 66800066651. The next prime is 66800066731. The reversal of 66800066652 is 25666000866.

It is a junction number, because it is equal to n+sod(n) for n = 66800066598 and 66800066607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66800066651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3658002 + ... + 3676217.

It is an arithmetic number, because the mean of its divisors is an integer number (2669656080).

Almost surely, 2^66800066652 is an apocalyptic number.

It is an amenable number.

66800066652 is an abundant number, since it is smaller than the sum of its proper divisors (125415171108).

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

66800066652 is a wasteful number, since it uses less digits than its factorization.

66800066652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7334263 (or 7334258 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 66800066652 in words is "sixty-six billion, eight hundred million, sixty-six thousand, six hundred fifty-two".