689360066 has 4 divisors (see below), whose sum is σ = 1034040102. Its totient is φ = 344680032.

The previous prime is 689359981. The next prime is 689360171. The reversal of 689360066 is 660063986.

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

It can be written as a sum of positive squares in only one way, i.e., 685340041 + 4020025 = 26179^2 + 2005^2 .

It is a junction number, because it is equal to n+sod(n) for n = 689359999 and 689360026.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172340015 + ... + 172340018.

Almost surely, 2^689360066 is an apocalyptic number.

689360066 is a deficient number, since it is larger than the sum of its proper divisors (344680036).

689360066 is a wasteful number, since it uses less digits than its factorization.

689360066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344680035.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 689360066 is about 26255.6673120300. The cubic root of 689360066 is about 883.3823283927.

The spelling of 689360066 in words is "six hundred eighty-nine million, three hundred sixty thousand, sixty-six".