531666617775 has 12 divisors (see below), whose sum is σ = 879022141512. Its totient is φ = 283555529440.

The previous prime is 531666617747. The next prime is 531666617777. The reversal of 531666617775 is 577716666135.

It is not a de Polignac number, because 531666617775 - 2⁵ = 531666617743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531666617777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3544444044 + ... + 3544444193.

It is an arithmetic number, because the mean of its divisors is an integer number (73251845126).

Almost surely, 2^531666617775 is an apocalyptic number.

531666617775 is a deficient number, since it is larger than the sum of its proper divisors (347355523737).

531666617775 is a wasteful number, since it uses less digits than its factorization.

531666617775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7088888250 (or 7088888245 counting only the distinct ones).

The product of its digits is 33339600, while the sum is 60.

The spelling of 531666617775 in words is "five hundred thirty-one billion, six hundred sixty-six million, six hundred seventeen thousand, seven hundred seventy-five".