664607414305623 has 32 divisors (see below), whose sum is σ = 898497765921280. Its totient is φ = 436937491814400.

The previous prime is 664607414305561. The next prime is 664607414305649. The reversal of 664607414305623 is 326503414706466.

It is not a de Polignac number, because 664607414305623 - 2¹⁰ = 664607414304599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664607414315623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 836875311 + ... + 837669087.

It is an arithmetic number, because the mean of its divisors is an integer number (28078055185040).

Almost surely, 2^{664607414305623} is an apocalyptic number.

664607414305623 is a deficient number, since it is larger than the sum of its proper divisors (233890351615657).

664607414305623 is a wasteful number, since it uses less digits than its factorization.

664607414305623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807367.

The product of its (nonzero) digits is 52254720, while the sum is 57.

The spelling of 664607414305623 in words is "six hundred sixty-four trillion, six hundred seven billion, four hundred fourteen million, three hundred five thousand, six hundred twenty-three".