689066621 has 8 divisors (see below), whose sum is σ = 703438560. Its totient is φ = 674745552.

The previous prime is 689066611. The next prime is 689066629. The reversal of 689066621 is 126660986.

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

It is a cyclic number.

It is not a de Polignac number, because 689066621 - 2¹⁸ = 688804477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689066629) 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, 15290 + ... + 40148.

It is an arithmetic number, because the mean of its divisors is an integer number (87929820).

Almost surely, 2^689066621 is an apocalyptic number.

It is an amenable number.

689066621 is a deficient number, since it is larger than the sum of its proper divisors (14371939).

689066621 is a wasteful number, since it uses less digits than its factorization.

689066621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25435.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 689066621 is about 26250.0784951207. The cubic root of 689066621 is about 883.2569653056.

The spelling of 689066621 in words is "six hundred eighty-nine million, sixty-six thousand, six hundred twenty-one".