1666683333485 has 4 divisors (see below), whose sum is σ = 2000020000188. Its totient is φ = 1333346666784.

The previous prime is 1666683333421. The next prime is 1666683333521. The reversal of 1666683333485 is 5843333866661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 356306323396 + 1310377010089 = 596914^2 + 1144717^2 .

It is a cyclic number.

It is not a de Polignac number, because 1666683333485 - 2⁶ = 1666683333421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166668333344 + ... + 166668333353.

It is an arithmetic number, because the mean of its divisors is an integer number (500005000047).

Almost surely, 2^{1666683333485} is an apocalyptic number.

It is an amenable number.

1666683333485 is a deficient number, since it is larger than the sum of its proper divisors (333336666703).

1666683333485 is an equidigital number, since it uses as much as digits as its factorization.

1666683333485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333336666702.

The product of its digits is 134369280, while the sum is 62.

The spelling of 1666683333485 in words is "one trillion, six hundred sixty-six billion, six hundred eighty-three million, three hundred thirty-three thousand, four hundred eighty-five".