1685053866 has 8 divisors (see below), whose sum is σ = 3370107744. Its totient is φ = 561684620.

The previous prime is 1685053859. The next prime is 1685053891. The reversal of 1685053866 is 6683505861.

It is a sphenic number, since it is the product of 3 distinct primes.

1685053866 is an admirable 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 3 ways as a sum of consecutive naturals, for example, 140421150 + ... + 140421161.

It is an arithmetic number, because the mean of its divisors is an integer number (421263468).

Almost surely, 2^1685053866 is an apocalyptic number.

1685053866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1685053866 is a wasteful number, since it uses less digits than its factorization.

1685053866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280842316.

The product of its (nonzero) digits is 1036800, while the sum is 48.

The square root of 1685053866 is about 41049.4076205735. The cubic root of 1685053866 is about 1189.9752521746.

The spelling of 1685053866 in words is "one billion, six hundred eighty-five million, fifty-three thousand, eight hundred sixty-six".