66185345802 has 8 divisors (see below), whose sum is σ = 132370691616. Its totient is φ = 22061781932.

The previous prime is 66185345791. The next prime is 66185345833. The reversal of 66185345802 is 20854358166.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

66185345802 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 5515445478 + ... + 5515445489.

It is an arithmetic number, because the mean of its divisors is an integer number (16546336452).

Almost surely, 2^66185345802 is an apocalyptic number.

66185345802 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66185345802 is a wasteful number, since it uses less digits than its factorization.

66185345802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11030890972.

The product of its (nonzero) digits is 1382400, while the sum is 48.

The spelling of 66185345802 in words is "sixty-six billion, one hundred eighty-five million, three hundred forty-five thousand, eight hundred two".