678917505075 has 24 divisors (see below), whose sum is σ = 1122654858288. Its totient is φ = 362031943680.

The previous prime is 678917505047. The next prime is 678917505103. The reversal of 678917505075 is 570505719876.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (678917505047) and next prime (678917505103).

It is not a de Polignac number, because 678917505075 - 2⁵ = 678917505043 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 238962 + ... + 1189511.

It is an arithmetic number, because the mean of its divisors is an integer number (46777285762).

Almost surely, 2^678917505075 is an apocalyptic number.

678917505075 is a deficient number, since it is larger than the sum of its proper divisors (443737353213).

678917505075 is a wasteful number, since it uses less digits than its factorization.

678917505075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434823 (or 1434818 counting only the distinct ones).

The product of its (nonzero) digits is 18522000, while the sum is 60.

The spelling of 678917505075 in words is "six hundred seventy-eight billion, nine hundred seventeen million, five hundred five thousand, seventy-five".