66655110560 has 24 divisors (see below), whose sum is σ = 157472699076. Its totient is φ = 26662044160.

The previous prime is 66655110553. The next prime is 66655110589. The reversal of 66655110560 is 6501155666.

It can be written as a sum of positive squares in 2 ways, for example, as 65161751824 + 1493358736 = 255268^2 + 38644^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208297061 + ... + 208297380.

Almost surely, 2^66655110560 is an apocalyptic number.

It is an amenable number.

66655110560 is an abundant number, since it is smaller than the sum of its proper divisors (90817588516).

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

66655110560 is a wasteful number, since it uses less digits than its factorization.

66655110560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416594456 (or 416594448 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 66655110560 in words is "sixty-six billion, six hundred fifty-five million, one hundred ten thousand, five hundred sixty".