664614311747 has 4 divisors (see below), whose sum is σ = 664921863336. Its totient is φ = 664306760160.

The previous prime is 664614311743. The next prime is 664614311749. The reversal of 664614311747 is 747113416466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 664614311747 - 2² = 664614311743 is a prime.

It is a super-3 number, since 3×664614311747³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664614311695 and 664614311704.

It is not an unprimeable number, because it can be changed into a prime (664614311743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153772553 + ... + 153776874.

It is an arithmetic number, because the mean of its divisors is an integer number (166230465834).

Almost surely, 2^664614311747 is an apocalyptic number.

664614311747 is a deficient number, since it is larger than the sum of its proper divisors (307551589).

664614311747 is a wasteful number, since it uses less digits than its factorization.

664614311747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307551588.

The product of its digits is 2032128, while the sum is 50.

The spelling of 664614311747 in words is "six hundred sixty-four billion, six hundred fourteen million, three hundred eleven thousand, seven hundred forty-seven".