664134653651562 has 24 divisors (see below), whose sum is σ = 1477849184253156. Its totient is φ = 215395022805696.

The previous prime is 664134653651561. The next prime is 664134653651659. The reversal of 664134653651562 is 265156356431466.

664134653651562 is a `hidden beast` number, since 6 + 6 + 4 + 1 + 3 + 4 + 6 + 5 + 3 + 65 + 1 + 562 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 451858816094841 + 212275837556721 = 21256971^2 + 14569689^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 664134653651562.

It is not an unprimeable number, because it can be changed into a prime (664134653651561) 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 11 ways as a sum of consecutive naturals, for example, 498599589163 + ... + 498599590494.

Almost surely, 2^{664134653651562} is an apocalyptic number.

664134653651562 is an abundant number, since it is smaller than the sum of its proper divisors (813714530601594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664134653651562 is a wasteful number, since it uses less digits than its factorization.

664134653651562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997199179702 (or 997199179699 counting only the distinct ones).

The product of its digits is 279936000, while the sum is 63.

The spelling of 664134653651562 in words is "six hundred sixty-four trillion, one hundred thirty-four billion, six hundred fifty-three million, six hundred fifty-one thousand, five hundred sixty-two".