1666666683454 has 16 divisors (see below), whose sum is σ = 2532363825600. Its totient is φ = 822551393664.

The previous prime is 1666666683443. The next prime is 1666666683457. The reversal of 1666666683454 is 4543866666661.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1666666683454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666666683457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 936967 + ... + 2052130.

It is an arithmetic number, because the mean of its divisors is an integer number (158272739100).

Almost surely, 2^{1666666683454} is an apocalyptic number.

1666666683454 is a deficient number, since it is larger than the sum of its proper divisors (865697142146).

1666666683454 is a wasteful number, since it uses less digits than its factorization.

1666666683454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2992707.

The product of its digits is 537477120, while the sum is 67.

The spelling of 1666666683454 in words is "one trillion, six hundred sixty-six billion, six hundred sixty-six million, six hundred eighty-three thousand, four hundred fifty-four".