66887822466 has 20 divisors (see below), whose sum is σ = 149878269222. Its totient is φ = 22295940768.

The previous prime is 66887822453. The next prime is 66887822479. The reversal of 66887822466 is 66422878866.

It is a happy number.

66887822466 is a `hidden beast` number, since 6 + 6 + 88 + 78 + 22 + 466 = 666.

It is an interprime number because it is at equal distance from previous prime (66887822453) and next prime (66887822479).

It can be written as a sum of positive squares in only one way, i.e., 55733294241 + 11154528225 = 236079^2 + 105615^2 .

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 206443735 + ... + 206444058.

Almost surely, 2^66887822466 is an apocalyptic number.

66887822466 is an abundant number, since it is smaller than the sum of its proper divisors (82990446756).

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

66887822466 is a wasteful number, since it uses less digits than its factorization.

66887822466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412887807 (or 412887798 counting only the distinct ones).

The product of its digits is 74317824, while the sum is 63.

The spelling of 66887822466 in words is "sixty-six billion, eight hundred eighty-seven million, eight hundred twenty-two thousand, four hundred sixty-six".