686748822007 has 4 divisors (see below), whose sum is σ = 686753322256. Its totient is φ = 686744321760.

The previous prime is 686748821971. The next prime is 686748822041. The reversal of 686748822007 is 700228847686.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-686748822007 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 (686748820007) 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, 2012883 + ... + 2329204.

It is an arithmetic number, because the mean of its divisors is an integer number (171688330564).

Almost surely, 2^686748822007 is an apocalyptic number.

686748822007 is a deficient number, since it is larger than the sum of its proper divisors (4500249).

686748822007 is a wasteful number, since it uses less digits than its factorization.

686748822007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4500248.

The product of its (nonzero) digits is 14450688, while the sum is 58.

The spelling of 686748822007 in words is "six hundred eighty-six billion, seven hundred forty-eight million, eight hundred twenty-two thousand, seven".