66136064660 has 24 divisors (see below), whose sum is σ = 139248377856. Its totient is φ = 26385351200.

The previous prime is 66136064651. The next prime is 66136064677. The reversal of 66136064660 is 6646063166.

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, 4309316 + ... + 4324635.

It is an arithmetic number, because the mean of its divisors is an integer number (5802015744).

Almost surely, 2^66136064660 is an apocalyptic number.

It is an amenable number.

66136064660 is an abundant number, since it is smaller than the sum of its proper divisors (73112313196).

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

66136064660 is a wasteful number, since it uses less digits than its factorization.

66136064660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8634343 (or 8634341 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 44.

The spelling of 66136064660 in words is "sixty-six billion, one hundred thirty-six million, sixty-four thousand, six hundred sixty".