678008617 has 12 divisors (see below), whose sum is σ = 802577860. Its totient is φ = 568956960.

The previous prime is 678008599. The next prime is 678008627. The reversal of 678008617 is 716800876.

It can be written as a sum of positive squares in 2 ways, for example, as 162537001 + 515471616 = 12749^2 + 22704^2 .

It is not a de Polignac number, because 678008617 - 2¹¹ = 678006569 is a prime.

It is a super-3 number, since 3×678008617³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678008627) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213942 + ... + 217087.

Almost surely, 2^678008617 is an apocalyptic number.

It is an amenable number.

678008617 is a deficient number, since it is larger than the sum of its proper divisors (124569243).

678008617 is a wasteful number, since it uses less digits than its factorization.

678008617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431064 (or 431053 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 678008617 is about 26038.5985990030. The cubic root of 678008617 is about 878.5066861080.

The spelling of 678008617 in words is "six hundred seventy-eight million, eight thousand, six hundred seventeen".