686842366 has 8 divisors (see below), whose sum is σ = 1177444080. Its totient is φ = 294361008.

The previous prime is 686842339. The next prime is 686842369. The reversal of 686842366 is 663248686.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686842369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24530071 + ... + 24530098.

It is an arithmetic number, because the mean of its divisors is an integer number (147180510).

Almost surely, 2^686842366 is an apocalyptic number.

686842366 is a deficient number, since it is larger than the sum of its proper divisors (490601714).

686842366 is a wasteful number, since it uses less digits than its factorization.

686842366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49060178.

The product of its digits is 1990656, while the sum is 49.

The square root of 686842366 is about 26207.6776155385. The cubic root of 686842366 is about 882.3055786480.

The spelling of 686842366 in words is "six hundred eighty-six million, eight hundred forty-two thousand, three hundred sixty-six".