1686081677 has 8 divisors (see below), whose sum is σ = 2010731136. Its totient is φ = 1382377392.

The previous prime is 1686081667. The next prime is 1686081703. The reversal of 1686081677 is 7761806861.

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

It is a cyclic number.

It is not a de Polignac number, because 1686081677 - 2⁶ = 1686081613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1686081667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5236118 + ... + 5236439.

It is an arithmetic number, because the mean of its divisors is an integer number (251341392).

Almost surely, 2^1686081677 is an apocalyptic number.

It is an amenable number.

1686081677 is a deficient number, since it is larger than the sum of its proper divisors (324649459).

1686081677 is a wasteful number, since it uses less digits than its factorization.

1686081677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10472587.

The product of its (nonzero) digits is 677376, while the sum is 50.

The square root of 1686081677 is about 41061.9249061707. The cubic root of 1686081677 is about 1190.2171477186.

The spelling of 1686081677 in words is "one billion, six hundred eighty-six million, eighty-one thousand, six hundred seventy-seven".