1666554716244 has 24 divisors (see below), whose sum is σ = 4242139278048. Its totient is φ = 505016580640.

The previous prime is 1666554716221. The next prime is 1666554716257. The reversal of 1666554716244 is 4426174556661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6312707127 + ... + 6312707390.

It is an arithmetic number, because the mean of its divisors is an integer number (176755803252).

Almost surely, 2^{1666554716244} is an apocalyptic number.

It is an amenable number.

1666554716244 is an abundant number, since it is smaller than the sum of its proper divisors (2575584561804).

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

1666554716244 is a wasteful number, since it uses less digits than its factorization.

1666554716244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12625414535 (or 12625414533 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 57.

The spelling of 1666554716244 in words is "one trillion, six hundred sixty-six billion, five hundred fifty-four million, seven hundred sixteen thousand, two hundred forty-four".