664633408532 has 12 divisors (see below), whose sum is σ = 1200628093056. Its totient is φ = 321596810520.

The previous prime is 664633408529. The next prime is 664633408553. The reversal of 664633408532 is 235804336466.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2679973298 + ... + 2679973545.

It is an arithmetic number, because the mean of its divisors is an integer number (100052341088).

Almost surely, 2^664633408532 is an apocalyptic number.

664633408532 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

664633408532 is a deficient number, since it is larger than the sum of its proper divisors (535994684524).

664633408532 is a wasteful number, since it uses less digits than its factorization.

664633408532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5359946878 (or 5359946876 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 50.

The spelling of 664633408532 in words is "six hundred sixty-four billion, six hundred thirty-three million, four hundred eight thousand, five hundred thirty-two".