689343566 has 8 divisors (see below), whose sum is σ = 1034237424. Its totient is φ = 344597760.

The previous prime is 689343563. The next prime is 689343587. The reversal of 689343566 is 665343986.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689343563) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 24530 + ... + 44501.

It is an arithmetic number, because the mean of its divisors is an integer number (129279678).

Almost surely, 2^689343566 is an apocalyptic number.

689343566 is a deficient number, since it is larger than the sum of its proper divisors (344893858).

689343566 is a wasteful number, since it uses less digits than its factorization.

689343566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74026.

The product of its digits is 2799360, while the sum is 50.

The square root of 689343566 is about 26255.3530922743. The cubic root of 689343566 is about 883.3752803465.

The spelling of 689343566 in words is "six hundred eighty-nine million, three hundred forty-three thousand, five hundred sixty-six".