1686897066 has 8 divisors (see below), whose sum is σ = 3373794144. Its totient is φ = 562299020.

The previous prime is 1686897053. The next prime is 1686897077. The reversal of 1686897066 is 6607986861.

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

1686897066 is an admirable number.

It is a super-2 number, since 2×1686897066² = 5691243422558816712, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1686896997 and 1686897015.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 140574750 + ... + 140574761.

It is an arithmetic number, because the mean of its divisors is an integer number (421724268).

Almost surely, 2^1686897066 is an apocalyptic number.

1686897066 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.

1686897066 is a wasteful number, since it uses less digits than its factorization.

1686897066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281149516.

The product of its (nonzero) digits is 5225472, while the sum is 57.

The square root of 1686897066 is about 41071.8524783093. The cubic root of 1686897066 is about 1190.4089797796.

The spelling of 1686897066 in words is "one billion, six hundred eighty-six million, eight hundred ninety-seven thousand, sixty-six".