686416763 has 4 divisors (see below), whose sum is σ = 686661048. Its totient is φ = 686172480.

The previous prime is 686416751. The next prime is 686416789. The reversal of 686416763 is 367614686.

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

It is a cyclic number.

It is not a de Polignac number, because 686416763 - 2¹⁰ = 686415739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686416063) 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, 117878 + ... + 123563.

It is an arithmetic number, because the mean of its divisors is an integer number (171665262).

Almost surely, 2^686416763 is an apocalyptic number.

686416763 is a deficient number, since it is larger than the sum of its proper divisors (244285).

686416763 is a wasteful number, since it uses less digits than its factorization.

686416763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244284.

The product of its digits is 870912, while the sum is 47.

The square root of 686416763 is about 26199.5565420486. The cubic root of 686416763 is about 882.1233002929.

The spelling of 686416763 in words is "six hundred eighty-six million, four hundred sixteen thousand, seven hundred sixty-three".