689566652 has 12 divisors (see below), whose sum is σ = 1206930816. Its totient is φ = 344729280.

The previous prime is 689566651. The next prime is 689566667. The reversal of 689566652 is 256665986.

It is a junction number, because it is equal to n+sod(n) for n = 689566594 and 689566603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689566651) 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 3 ways as a sum of consecutive naturals, for example, 32933 + ... + 49635.

It is an arithmetic number, because the mean of its divisors is an integer number (100577568).

Almost surely, 2^689566652 is an apocalyptic number.

It is an amenable number.

689566652 is a deficient number, since it is larger than the sum of its proper divisors (517364164).

689566652 is a wasteful number, since it uses less digits than its factorization.

689566652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27028 (or 27026 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 53.

The square root of 689566652 is about 26259.6011393928. The cubic root of 689566652 is about 883.4705629762.

The spelling of 689566652 in words is "six hundred eighty-nine million, five hundred sixty-six thousand, six hundred fifty-two".