66910459338 has 48 divisors (see below), whose sum is σ = 153839874240. Its totient is φ = 20972172672.

The previous prime is 66910459333. The next prime is 66910459349. The reversal of 66910459338 is 83395401966.

66910459338 is a `hidden beast` number, since 6 + 6 + 9 + 10 + 4 + 593 + 38 = 666.

66910459338 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66910459333) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1345231 + ... + 1394082.

It is an arithmetic number, because the mean of its divisors is an integer number (3204997380).

Almost surely, 2^66910459338 is an apocalyptic number.

66910459338 is an abundant number, since it is smaller than the sum of its proper divisors (86929414902).

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

66910459338 is a wasteful number, since it uses less digits than its factorization.

66910459338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2739403 (or 2739400 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 66910459338 in words is "sixty-six billion, nine hundred ten million, four hundred fifty-nine thousand, three hundred thirty-eight".