66655471100 has 36 divisors (see below), whose sum is σ = 145153537704. Its totient is φ = 26567964480.

The previous prime is 66655471093. The next prime is 66655471123. The reversal of 66655471100 is 117455666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1149359 + ... + 1205958.

It is an arithmetic number, because the mean of its divisors is an integer number (4032042714).

Almost surely, 2^66655471100 is an apocalyptic number.

It is an amenable number.

66655471100 is an abundant number, since it is smaller than the sum of its proper divisors (78498066604).

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

66655471100 is a wasteful number, since it uses less digits than its factorization.

66655471100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2355614 (or 2355607 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 66655471100 in words is "sixty-six billion, six hundred fifty-five million, four hundred seventy-one thousand, one hundred".