1666454646364 has 12 divisors (see below), whose sum is σ = 2916311756904. Its totient is φ = 833222715824.

The previous prime is 1666454646359. The next prime is 1666454646391. The reversal of 1666454646364 is 4636464546661.

It is a congruent number.

It is an unprimeable number.

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, 261574 + ... + 1844269.

It is an arithmetic number, because the mean of its divisors is an integer number (243025979742).

Almost surely, 2^{1666454646364} is an apocalyptic number.

It is an amenable number.

1666454646364 is a deficient number, since it is larger than the sum of its proper divisors (1249857110540).

1666454646364 is a wasteful number, since it uses less digits than its factorization.

1666454646364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2303684 (or 2303682 counting only the distinct ones).

The product of its digits is 179159040, while the sum is 61.

The spelling of 1666454646364 in words is "one trillion, six hundred sixty-six billion, four hundred fifty-four million, six hundred forty-six thousand, three hundred sixty-four".