664000523000 has 32 divisors (see below), whose sum is σ = 1553761226160. Its totient is φ = 265600208800.

The previous prime is 664000522963. The next prime is 664000523009. The reversal of 664000523000 is 325000466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664000523009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331999262 + ... + 332001261.

Almost surely, 2^664000523000 is an apocalyptic number.

It is an amenable number.

664000523000 is an abundant number, since it is smaller than the sum of its proper divisors (889760703160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664000523000 is a wasteful number, since it uses less digits than its factorization.

664000523000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664000544 (or 664000530 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 664000523000 its reverse (325000466), we get a palindrome (664325523466).

The spelling of 664000523000 in words is "six hundred sixty-four billion, five hundred twenty-three thousand".