16666262640164 has 12 divisors (see below), whose sum is σ = 29165990469084. Its totient is φ = 8333122506144.

The previous prime is 16666262640163. The next prime is 16666262640179. The reversal of 16666262640164 is 46104626266661.

It can be written as a sum of positive squares in 2 ways, for example, as 15914993209600 + 751269430564 = 3989360^2 + 866758^2 .

It is not an unprimeable number, because it can be changed into a prime (16666262640163) 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 3 ways as a sum of consecutive naturals, for example, 3977522 + ... + 7010934.

It is an arithmetic number, because the mean of its divisors is an integer number (2430499205757).

Almost surely, 2^{16666262640164} is an apocalyptic number.

It is an amenable number.

16666262640164 is a deficient number, since it is larger than the sum of its proper divisors (12499727828920).

16666262640164 is a wasteful number, since it uses less digits than its factorization.

16666262640164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4406974 (or 4406972 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 56.

The spelling of 16666262640164 in words is "sixteen trillion, six hundred sixty-six billion, two hundred sixty-two million, six hundred forty thousand, one hundred sixty-four".