660543104664564 has 24 divisors (see below), whose sum is σ = 1681382448237408. Its totient is φ = 200164577171040.

The previous prime is 660543104664409. The next prime is 660543104664571. The reversal of 660543104664564 is 465466401345066.

It is a junction number, because it is equal to n+sod(n) for n = 660543104664498 and 660543104664507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2502057214507 + ... + 2502057214770.

It is an arithmetic number, because the mean of its divisors is an integer number (70057602009892).

Almost surely, 2^{660543104664564} is an apocalyptic number.

It is an amenable number.

660543104664564 is an abundant number, since it is smaller than the sum of its proper divisors (1020839343572844).

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

660543104664564 is a wasteful number, since it uses less digits than its factorization.

660543104664564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5004114429295 (or 5004114429293 counting only the distinct ones).

The product of its (nonzero) digits is 149299200, while the sum is 60.

The spelling of 660543104664564 in words is "six hundred sixty trillion, five hundred forty-three billion, one hundred four million, six hundred sixty-four thousand, five hundred sixty-four".