678351907567 has 4 divisors (see below), whose sum is σ = 686524822200. Its totient is φ = 670178992936.

The previous prime is 678351907501. The next prime is 678351907603. The reversal of 678351907567 is 765709153876.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 678351907567 - 2¹⁵ = 678351874799 is a prime.

It is a super-2 number, since 2×678351907567² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 678351907499 and 678351907508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678351907067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4086457192 + ... + 4086457357.

It is an arithmetic number, because the mean of its divisors is an integer number (171631205550).

Almost surely, 2^678351907567 is an apocalyptic number.

678351907567 is a deficient number, since it is larger than the sum of its proper divisors (8172914633).

678351907567 is an equidigital number, since it uses as much as digits as its factorization.

678351907567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8172914632.

The product of its (nonzero) digits is 66679200, while the sum is 64.

The spelling of 678351907567 in words is "six hundred seventy-eight billion, three hundred fifty-one million, nine hundred seven thousand, five hundred sixty-seven".