664437532217203 has 8 divisors (see below), whose sum is σ = 703710250824240. Its totient is φ = 625185720042240.

The previous prime is 664437532217191. The next prime is 664437532217209. The reversal of 664437532217203 is 302712235734466.

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

It is not a de Polignac number, because 664437532217203 - 2⁵ = 664437532217171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664437532217209) 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, 5226542578 + ... + 5226669703.

It is an arithmetic number, because the mean of its divisors is an integer number (87963781353030).

Almost surely, 2^{664437532217203} is an apocalyptic number.

664437532217203 is a deficient number, since it is larger than the sum of its proper divisors (39272718607037).

664437532217203 is a wasteful number, since it uses less digits than its factorization.

664437532217203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10453216037.

The product of its (nonzero) digits is 30481920, while the sum is 55.

The spelling of 664437532217203 in words is "six hundred sixty-four trillion, four hundred thirty-seven billion, five hundred thirty-two million, two hundred seventeen thousand, two hundred three".