678417685 has 8 divisors (see below), whose sum is σ = 888110496. Its totient is φ = 493394640.

The previous prime is 678417659. The next prime is 678417703. The reversal of 678417685 is 586714876.

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

It is not a de Polignac number, because 678417685 - 2⁵ = 678417653 is a prime.

It is a Duffinian number.

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, 6167379 + ... + 6167488.

It is an arithmetic number, because the mean of its divisors is an integer number (111013812).

Almost surely, 2^678417685 is an apocalyptic number.

It is an amenable number.

678417685 is a deficient number, since it is larger than the sum of its proper divisors (209692811).

678417685 is a wasteful number, since it uses less digits than its factorization.

678417685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12334883.

The product of its digits is 2257920, while the sum is 52.

The square root of 678417685 is about 26046.4524455827. The cubic root of 678417685 is about 878.6833292531.

The spelling of 678417685 in words is "six hundred seventy-eight million, four hundred seventeen thousand, six hundred eighty-five".