1666317118 has 16 divisors (see below), whose sum is σ = 2666713104. Its totient is φ = 778161280.

The previous prime is 1666317113. The next prime is 1666317131. The reversal of 1666317118 is 8117136661.

It is a super-2 number, since 2×1666317118² = 5553225475479651848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666317113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182605 + ... + 191512.

It is an arithmetic number, because the mean of its divisors is an integer number (166669569).

Almost surely, 2^1666317118 is an apocalyptic number.

1666317118 is a deficient number, since it is larger than the sum of its proper divisors (1000395986).

1666317118 is a wasteful number, since it uses less digits than its factorization.

1666317118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374267.

The product of its digits is 36288, while the sum is 40.

The square root of 1666317118 is about 40820.5477425279. The cubic root of 1666317118 is about 1185.5482085473.

The spelling of 1666317118 in words is "one billion, six hundred sixty-six million, three hundred seventeen thousand, one hundred eighteen".