66150068800 has 84 divisors (see below), whose sum is σ = 164599749540. Its totient is φ = 26162667520.

The previous prime is 66150068791. The next prime is 66150068819. The reversal of 66150068800 is 886005166.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 19921628736 + 46228440064 = 141144^2 + 215008^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89869 + ... + 374668.

Almost surely, 2^66150068800 is an apocalyptic number.

It is an amenable number.

66150068800 is an abundant number, since it is smaller than the sum of its proper divisors (98449680740).

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

66150068800 is a wasteful number, since it uses less digits than its factorization.

66150068800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464648 (or 464633 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 66150068800 in words is "sixty-six billion, one hundred fifty million, sixty-eight thousand, eight hundred".