6689906558 has 16 divisors (see below), whose sum is σ = 10100436480. Its totient is φ = 3323157336.

The previous prime is 6689906533. The next prime is 6689906591. The reversal of 6689906558 is 8556099866.

It is a self number, because there is not a number n which added to its sum of digits gives 6689906558.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202085 + ... + 232847.

It is an arithmetic number, because the mean of its divisors is an integer number (631277280).

Almost surely, 2^6689906558 is an apocalyptic number.

6689906558 is a deficient number, since it is larger than the sum of its proper divisors (3410529922).

6689906558 is a wasteful number, since it uses less digits than its factorization.

6689906558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31471.

The product of its (nonzero) digits is 27993600, while the sum is 62.

The square root of 6689906558 is about 81791.8489704200. The cubic root of 6689906558 is about 1884.2564789446.

The spelling of 6689906558 in words is "six billion, six hundred eighty-nine million, nine hundred six thousand, five hundred fifty-eight".