17748648666 has 32 divisors (see below), whose sum is σ = 45075934080. Its totient is φ = 5071042368.

The previous prime is 17748648649. The next prime is 17748648679. The reversal of 17748648666 is 66684684771.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23476671 + ... + 23477426.

It is an arithmetic number, because the mean of its divisors is an integer number (1408622940).

Almost surely, 2^17748648666 is an apocalyptic number.

17748648666 is an abundant number, since it is smaller than the sum of its proper divisors (27327285414).

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

17748648666 is a wasteful number, since it uses less digits than its factorization.

17748648666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46954115 (or 46954109 counting only the distinct ones).

The product of its digits is 65028096, while the sum is 63.

The spelling of 17748648666 in words is "seventeen billion, seven hundred forty-eight million, six hundred forty-eight thousand, six hundred sixty-six".