666065963897 has 8 divisors (see below), whose sum is σ = 702070826400. Its totient is φ = 630155977344.

The previous prime is 666065963867. The next prime is 666065963963. The reversal of 666065963897 is 798369560666.

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-666065963897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 666065963897.

It is not an unprimeable number, because it can be changed into a prime (666065963807) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 23704568 + ... + 23732649.

It is an arithmetic number, because the mean of its divisors is an integer number (87758853300).

Almost surely, 2^666065963897 is an apocalyptic number.

It is an amenable number.

666065963897 is a deficient number, since it is larger than the sum of its proper divisors (36004862503).

666065963897 is a wasteful number, since it uses less digits than its factorization.

666065963897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47437975.

The product of its (nonzero) digits is 529079040, while the sum is 71.

The spelling of 666065963897 in words is "six hundred sixty-six billion, sixty-five million, nine hundred sixty-three thousand, eight hundred ninety-seven".