689766658 has 16 divisors (see below), whose sum is σ = 1183235904. Its totient is φ = 295419600.

The previous prime is 689766629. The next prime is 689766659. The reversal of 689766658 is 856667986.

It is a junction number, because it is equal to n+sod(n) for n = 689766596 and 689766605.

It is not an unprimeable number, because it can be changed into a prime (689766659) 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, 6933 + ... + 37783.

It is an arithmetic number, because the mean of its divisors is an integer number (73952244).

Almost surely, 2^689766658 is an apocalyptic number.

689766658 is a deficient number, since it is larger than the sum of its proper divisors (493469246).

689766658 is a wasteful number, since it uses less digits than its factorization.

689766658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32457.

The product of its digits is 26127360, while the sum is 61.

The square root of 689766658 is about 26263.4091084916. The cubic root of 689766658 is about 883.5559703993. Note that the first 3 decimals are identical.

The spelling of 689766658 in words is "six hundred eighty-nine million, seven hundred sixty-six thousand, six hundred fifty-eight".