66450382079 has 8 divisors (see below), whose sum is σ = 67278677760. Its totient is φ = 65622745816.

The previous prime is 66450382073. The next prime is 66450382093. The reversal of 66450382079 is 97028305466.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66450382079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66450382073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39512 + ... + 366690.

It is an arithmetic number, because the mean of its divisors is an integer number (8409834720).

Almost surely, 2^66450382079 is an apocalyptic number.

66450382079 is a deficient number, since it is larger than the sum of its proper divisors (828295681).

66450382079 is a wasteful number, since it uses less digits than its factorization.

66450382079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329709.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 66450382079 in words is "sixty-six billion, four hundred fifty million, three hundred eighty-two thousand, seventy-nine".