66338194376 has 48 divisors (see below), whose sum is σ = 136399070340. Its totient is φ = 30141440000.

The previous prime is 66338194357. The next prime is 66338194387. The reversal of 66338194376 is 67349183366.

It can be written as a sum of positive squares in 6 ways, for example, as 61094986276 + 5243208100 = 247174^2 + 72410^2 .

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, 175625 + ... + 404376.

Almost surely, 2^66338194376 is an apocalyptic number.

It is an amenable number.

66338194376 is an abundant number, since it is smaller than the sum of its proper divisors (70060875964).

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

66338194376 is a wasteful number, since it uses less digits than its factorization.

66338194376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580082 (or 580049 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 56.

It can be divided in two parts, 663381 and 94376, that added together give a palindrome (757757).

The spelling of 66338194376 in words is "sixty-six billion, three hundred thirty-eight million, one hundred ninety-four thousand, three hundred seventy-six".