686071696 has 20 divisors (see below), whose sum is σ = 1361686284. Its totient is φ = 334668800.

The previous prime is 686071693. The next prime is 686071699. The reversal of 686071696 is 696170686.

It is an interprime number because it is at equal distance from previous prime (686071693) and next prime (686071699).

It can be written as a sum of positive squares in 2 ways, for example, as 85821696 + 600250000 = 9264^2 + 24500^2 .

It is not an unprimeable number, because it can be changed into a prime (686071691) 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, 522265 + ... + 523576.

Almost surely, 2^686071696 is an apocalyptic number.

It is an amenable number.

686071696 is a deficient number, since it is larger than the sum of its proper divisors (675614588).

686071696 is a wasteful number, since it uses less digits than its factorization.

686071696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045890 (or 1045884 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 686071696 is about 26192.9703546581. The cubic root of 686071696 is about 881.9754587879.

The spelling of 686071696 in words is "six hundred eighty-six million, seventy-one thousand, six hundred ninety-six".