664437571133477 has 16 divisors (see below), whose sum is σ = 695089473120000. Its totient is φ = 634302044095104.

The previous prime is 664437571133359. The next prime is 664437571133669. The reversal of 664437571133477 is 774331175734466.

It is a cyclic number.

It is not a de Polignac number, because 664437571133477 - 2⁴⁰ = 663338059505701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664437571136477) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 101573024 + ... + 107916422.

It is an arithmetic number, because the mean of its divisors is an integer number (43443092070000).

Almost surely, 2^{664437571133477} is an apocalyptic number.

It is an amenable number.

664437571133477 is a deficient number, since it is larger than the sum of its proper divisors (30651901986523).

664437571133477 is a wasteful number, since it uses less digits than its factorization.

664437571133477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6384100.

The product of its digits is 746807040, while the sum is 68.

The spelling of 664437571133477 in words is "six hundred sixty-four trillion, four hundred thirty-seven billion, five hundred seventy-one million, one hundred thirty-three thousand, four hundred seventy-seven".