838585661 has 8 divisors (see below), whose sum is σ = 847924224. Its totient is φ = 829261440.

The previous prime is 838585621. The next prime is 838585667. The reversal of 838585661 is 166585838.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-838585661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838585667) 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, 149636 + ... + 155138.

It is an arithmetic number, because the mean of its divisors is an integer number (105990528).

Almost surely, 2^838585661 is an apocalyptic number.

It is an amenable number.

838585661 is a deficient number, since it is larger than the sum of its proper divisors (9338563).

838585661 is a wasteful number, since it uses less digits than its factorization.

838585661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7171.

The product of its digits is 1382400, while the sum is 50.

The square root of 838585661 is about 28958.3435472404. The cubic root of 838585661 is about 943.0089415427.

The spelling of 838585661 in words is "eight hundred thirty-eight million, five hundred eighty-five thousand, six hundred sixty-one".