66823505706 has 8 divisors (see below), whose sum is σ = 133647011424. Its totient is φ = 22274501900.

The previous prime is 66823505677. The next prime is 66823505711. The reversal of 66823505706 is 60750532866.

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

66823505706 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5568625470 + ... + 5568625481.

It is an arithmetic number, because the mean of its divisors is an integer number (16705876428).

Almost surely, 2^66823505706 is an apocalyptic number.

66823505706 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.

66823505706 is a wasteful number, since it uses less digits than its factorization.

66823505706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11137250956.

The product of its (nonzero) digits is 1814400, while the sum is 48.

The spelling of 66823505706 in words is "sixty-six billion, eight hundred twenty-three million, five hundred five thousand, seven hundred six".