679891956567 has 16 divisors (see below), whose sum is σ = 907627500000. Its totient is φ = 452709103104.

The previous prime is 679891956559. The next prime is 679891956577. The reversal of 679891956567 is 765659198976.

It is not a de Polignac number, because 679891956567 - 2³ = 679891956559 is a prime.

It is a super-3 number, since 3×679891956567³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 679891956492 and 679891956501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679891956577) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12059059 + ... + 12115307.

It is an arithmetic number, because the mean of its divisors is an integer number (56726718750).

Almost surely, 2^679891956567 is an apocalyptic number.

679891956567 is a deficient number, since it is larger than the sum of its proper divisors (227735543433).

679891956567 is a wasteful number, since it uses less digits than its factorization.

679891956567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61090.

The product of its digits is 1543147200, while the sum is 78.

The spelling of 679891956567 in words is "six hundred seventy-nine billion, eight hundred ninety-one million, nine hundred fifty-six thousand, five hundred sixty-seven".