1686678445 has 8 divisors (see below), whose sum is σ = 2024985600. Its totient is φ = 1348695120.

The previous prime is 1686678439. The next prime is 1686678451. The reversal of 1686678445 is 5448766861.

It is an interprime number because it is at equal distance from previous prime (1686678439) and next prime (1686678451).

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

It is not a de Polignac number, because 1686678445 - 2¹⁵ = 1686645677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69345 + ... + 90454.

It is an arithmetic number, because the mean of its divisors is an integer number (253123200).

Almost surely, 2^1686678445 is an apocalyptic number.

It is an amenable number.

1686678445 is a deficient number, since it is larger than the sum of its proper divisors (338307155).

1686678445 is a wasteful number, since it uses less digits than its factorization.

1686678445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161915.

The product of its digits is 7741440, while the sum is 55.

The square root of 1686678445 is about 41069.1909464991. The cubic root of 1686678445 is about 1190.3575520921.

The spelling of 1686678445 in words is "one billion, six hundred eighty-six million, six hundred seventy-eight thousand, four hundred forty-five".