66058235656 has 128 divisors (see below), whose sum is σ = 153050204160. Its totient is φ = 26085888000.

The previous prime is 66058235627. The next prime is 66058235657. The reversal of 66058235656 is 65653285066.

It is not an unprimeable number, because it can be changed into a prime (66058235657) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12947506 + ... + 12952606.

It is an arithmetic number, because the mean of its divisors is an integer number (1195704720).

Almost surely, 2^66058235656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66058235656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76525102080).

66058235656 is an abundant number, since it is smaller than the sum of its proper divisors (86991968504).

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

66058235656 is a wasteful number, since it uses less digits than its factorization.

66058235656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5415 (or 5411 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 52.

The spelling of 66058235656 in words is "sixty-six billion, fifty-eight million, two hundred thirty-five thousand, six hundred fifty-six".