13438599066 has 12 divisors (see below), whose sum is σ = 29116964682. Its totient is φ = 4479533016.

The previous prime is 13438598959. The next prime is 13438599067. The reversal of 13438599066 is 66099583431.

13438599066 is a `hidden beast` number, since 1 + 3 + 43 + 8 + 599 + 0 + 6 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13231670841 + 206928225 = 115029^2 + 14385^2 .

It is not an unprimeable number, because it can be changed into a prime (13438599067) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 373294401 + ... + 373294436.

Almost surely, 2^13438599066 is an apocalyptic number.

13438599066 is an abundant number, since it is smaller than the sum of its proper divisors (15678365616).

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

13438599066 is a wasteful number, since it uses less digits than its factorization.

13438599066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746588845 (or 746588842 counting only the distinct ones).

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

The spelling of 13438599066 in words is "thirteen billion, four hundred thirty-eight million, five hundred ninety-nine thousand, sixty-six".