1666683518350 has 12 divisors (see below), whose sum is σ = 3100031344224. Its totient is φ = 666673407320.

The previous prime is 1666683518327. The next prime is 1666683518393. The reversal of 1666683518350 is 538153866661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16666835134 + ... + 16666835233.

It is an arithmetic number, because the mean of its divisors is an integer number (258335945352).

Almost surely, 2^{1666683518350} is an apocalyptic number.

1666683518350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1666683518350 is a deficient number, since it is larger than the sum of its proper divisors (1433347825874).

1666683518350 is a wasteful number, since it uses less digits than its factorization.

1666683518350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33333670379 (or 33333670374 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 58.

The spelling of 1666683518350 in words is "one trillion, six hundred sixty-six billion, six hundred eighty-three million, five hundred eighteen thousand, three hundred fifty".