1686670017 has 16 divisors (see below), whose sum is σ = 2362435200. Its totient is φ = 1068332672.

The previous prime is 1686670009. The next prime is 1686670019. The reversal of 1686670017 is 7100766861.

It is a cyclic number.

It is not a de Polignac number, because 1686670017 - 2³ = 1686670009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1686670019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71748 + ... + 92309.

It is an arithmetic number, because the mean of its divisors is an integer number (147652200).

Almost surely, 2^1686670017 is an apocalyptic number.

It is an amenable number.

1686670017 is a deficient number, since it is larger than the sum of its proper divisors (675765183).

1686670017 is a wasteful number, since it uses less digits than its factorization.

1686670017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164232.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 1686670017 is about 41069.0883390416. The cubic root of 1686670017 is about 1190.3555694281.

The spelling of 1686670017 in words is "one billion, six hundred eighty-six million, six hundred seventy thousand, seventeen".