1850001666685 has 32 divisors (see below), whose sum is σ = 2246365094400. Its totient is φ = 1462486944000.

The previous prime is 1850001666661. The next prime is 1850001666691. The reversal of 1850001666685 is 5866661000581.

It is not a de Polignac number, because 1850001666685 - 2¹⁵ = 1850001633917 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1067513079 + ... + 1067514811.

It is an arithmetic number, because the mean of its divisors is an integer number (70198909200).

Almost surely, 2^{1850001666685} is an apocalyptic number.

It is an amenable number.

1850001666685 is a deficient number, since it is larger than the sum of its proper divisors (396363427715).

1850001666685 is a wasteful number, since it uses less digits than its factorization.

1850001666685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4749.

The product of its (nonzero) digits is 2073600, while the sum is 52.

The spelling of 1850001666685 in words is "one trillion, eight hundred fifty billion, one million, six hundred sixty-six thousand, six hundred eighty-five".