66286348578 has 12 divisors (see below), whose sum is σ = 143620421958. Its totient is φ = 22095449520.

The previous prime is 66286348573. The next prime is 66286348603. The reversal of 66286348578 is 87584368266.

66286348578 is a `hidden beast` number, since 6 + 6 + 2 + 86 + 3 + 485 + 78 = 666.

It can be written as a sum of positive squares in only one way, i.e., 52561523169 + 13724825409 = 229263^2 + 117153^2 .

It is not an unprimeable number, because it can be changed into a prime (66286348573) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1841287443 + ... + 1841287478.

Almost surely, 2^66286348578 is an apocalyptic number.

66286348578 is an abundant number, since it is smaller than the sum of its proper divisors (77334073380).

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

66286348578 is a wasteful number, since it uses less digits than its factorization.

66286348578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3682574929 (or 3682574926 counting only the distinct ones).

The product of its digits is 92897280, while the sum is 63.

The spelling of 66286348578 in words is "sixty-six billion, two hundred eighty-six million, three hundred forty-eight thousand, five hundred seventy-eight".