664912124801 has 8 divisors (see below), whose sum is σ = 665711757024. Its totient is φ = 664112640960.

The previous prime is 664912124797. The next prime is 664912124819. The reversal of 664912124801 is 108421219466.

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

It is a cyclic number.

It is not a de Polignac number, because 664912124801 - 2² = 664912124797 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664912124881) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10810706 + ... + 10872036.

It is an arithmetic number, because the mean of its divisors is an integer number (83213969628).

Almost surely, 2^664912124801 is an apocalyptic number.

It is an amenable number.

664912124801 is a deficient number, since it is larger than the sum of its proper divisors (799632223).

664912124801 is a wasteful number, since it uses less digits than its factorization.

664912124801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74191.

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 664912124801 in words is "six hundred sixty-four billion, nine hundred twelve million, one hundred twenty-four thousand, eight hundred one".