1685056667 has 12 divisors (see below), whose sum is σ = 2032473456. Its totient is φ = 1368314640.

The previous prime is 1685056631. The next prime is 1685056721. The reversal of 1685056667 is 7666505861.

It is not a de Polignac number, because 1685056667 - 2⁶ = 1685056603 is a prime.

It is a super-2 number, since 2×1685056667² = 5678831942002297778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1685052667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 330884 + ... + 335937.

It is an arithmetic number, because the mean of its divisors is an integer number (169372788).

Almost surely, 2^1685056667 is an apocalyptic number.

1685056667 is a deficient number, since it is larger than the sum of its proper divisors (347416789).

1685056667 is an equidigital number, since it uses as much as digits as its factorization.

1685056667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666866 (or 666847 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 50.

The square root of 1685056667 is about 41049.4417379823. The cubic root of 1685056667 is about 1189.9759115243.

The spelling of 1685056667 in words is "one billion, six hundred eighty-five million, fifty-six thousand, six hundred sixty-seven".