664174347857 has 8 divisors (see below), whose sum is σ = 706127937984. Its totient is φ = 623310461488.

The previous prime is 664174347839. The next prime is 664174347877. The reversal of 664174347857 is 758743471466.

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 664174347857 - 2⁸ = 664174347601 is a prime.

It is a super-2 number, since 2×664174347857² (a number of 24 digits) contains 22 as substring.

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 664174347857.

It is not an unprimeable number, because it can be changed into a prime (664174347877) 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, 272424683 + ... + 272427120.

It is an arithmetic number, because the mean of its divisors is an integer number (88265992248).

Almost surely, 2^664174347857 is an apocalyptic number.

It is an amenable number.

664174347857 is a deficient number, since it is larger than the sum of its proper divisors (41953590127).

664174347857 is a wasteful number, since it uses less digits than its factorization.

664174347857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544851879.

The product of its digits is 94832640, while the sum is 62.

The spelling of 664174347857 in words is "six hundred sixty-four billion, one hundred seventy-four million, three hundred forty-seven thousand, eight hundred fifty-seven".