678717687075 has 48 divisors (see below), whose sum is σ = 1162683321600. Its totient is φ = 348946012800.

The previous prime is 678717687071. The next prime is 678717687077. The reversal of 678717687075 is 570786717876.

It is not a de Polignac number, because 678717687075 - 2² = 678717687071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (678717687071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1125156 + ... + 1619694.

It is an arithmetic number, because the mean of its divisors is an integer number (24222569200).

Almost surely, 2^678717687075 is an apocalyptic number.

678717687075 is a deficient number, since it is larger than the sum of its proper divisors (483965634525).

678717687075 is a wasteful number, since it uses less digits than its factorization.

678717687075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495212 (or 495207 counting only the distinct ones).

The product of its (nonzero) digits is 193616640, while the sum is 69.

The spelling of 678717687075 in words is "six hundred seventy-eight billion, seven hundred seventeen million, six hundred eighty-seven thousand, seventy-five".