679966551 has 24 divisors (see below), whose sum is σ = 1081881216. Its totient is φ = 408093840.

The previous prime is 679966543. The next prime is 679966559. The reversal of 679966551 is 155669976.

It is an interprime number because it is at equal distance from previous prime (679966543) and next prime (679966559).

It is not a de Polignac number, because 679966551 - 2³ = 679966543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679966559) 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 23 ways as a sum of consecutive naturals, for example, 23145 + ... + 43538.

It is an arithmetic number, because the mean of its divisors is an integer number (45078384).

Almost surely, 2^679966551 is an apocalyptic number.

679966551 is a deficient number, since it is larger than the sum of its proper divisors (401914665).

679966551 is a wasteful number, since it uses less digits than its factorization.

679966551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66803 (or 66800 counting only the distinct ones).

The product of its digits is 3061800, while the sum is 54.

The square root of 679966551 is about 26076.1682576256. The cubic root of 679966551 is about 879.3515156113.

It can be divided in two parts, 67996 and 6551, that added together give a palindrome (74547).

The spelling of 679966551 in words is "six hundred seventy-nine million, nine hundred sixty-six thousand, five hundred fifty-one".