678167335085 has 8 divisors (see below), whose sum is σ = 816967343736. Its totient is φ = 540422840320.

The previous prime is 678167335081. The next prime is 678167335129. The reversal of 678167335085 is 580533761876.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 288328189444 + 389839145641 = 536962^2 + 624371^2 .

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

It is not a de Polignac number, because 678167335085 - 2² = 678167335081 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678167335081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263877056 + ... + 263879625.

It is an arithmetic number, because the mean of its divisors is an integer number (102120917967).

Almost surely, 2^678167335085 is an apocalyptic number.

It is an amenable number.

678167335085 is a deficient number, since it is larger than the sum of its proper divisors (138800008651).

678167335085 is a wasteful number, since it uses less digits than its factorization.

678167335085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527756943.

The product of its (nonzero) digits is 25401600, while the sum is 59.

The spelling of 678167335085 in words is "six hundred seventy-eight billion, one hundred sixty-seven million, three hundred thirty-five thousand, eighty-five".