17666348872 has 16 divisors (see below), whose sum is σ = 33128958060. Its totient is φ = 8831960064.

The previous prime is 17666348839. The next prime is 17666348873. The reversal of 17666348872 is 27884366671.

It can be written as a sum of positive squares in 2 ways, for example, as 16658032356 + 1008316516 = 129066^2 + 31754^2 .

It is not an unprimeable number, because it can be changed into a prime (17666348873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88413 + ... + 207724.

Almost surely, 2^17666348872 is an apocalyptic number.

It is an amenable number.

17666348872 is a deficient number, since it is larger than the sum of its proper divisors (15462609188).

17666348872 is a wasteful number, since it uses less digits than its factorization.

17666348872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303600 (or 303596 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 58.

The spelling of 17666348872 in words is "seventeen billion, six hundred sixty-six million, three hundred forty-eight thousand, eight hundred seventy-two".