664838828534 has 8 divisors (see below), whose sum is σ = 1031646458160. Its totient is φ = 320956675816.

The previous prime is 664838828501. The next prime is 664838828569. The reversal of 664838828534 is 435828838466.

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

It is a super-2 number, since 2×664838828534² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5731369154 + ... + 5731369269.

It is an arithmetic number, because the mean of its divisors is an integer number (128955807270).

Almost surely, 2^664838828534 is an apocalyptic number.

664838828534 is a deficient number, since it is larger than the sum of its proper divisors (366807629626).

664838828534 is a wasteful number, since it uses less digits than its factorization.

664838828534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11462738454.

The product of its digits is 212336640, while the sum is 65.

The spelling of 664838828534 in words is "six hundred sixty-four billion, eight hundred thirty-eight million, eight hundred twenty-eight thousand, five hundred thirty-four".