686554665417 has 8 divisors (see below), whose sum is σ = 1017118022880. Its totient is φ = 457703110260.

The previous prime is 686554665413. The next prime is 686554665437. The reversal of 686554665417 is 714566455686.

It is a happy number.

686554665417 is a `hidden beast` number, since 6 + 8 + 6 + 554 + 6 + 65 + 4 + 17 = 666.

It is not a de Polignac number, because 686554665417 - 2² = 686554665413 is a prime.

It is not an unprimeable number, because it can be changed into a prime (686554665413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12713975259 + ... + 12713975312.

It is an arithmetic number, because the mean of its divisors is an integer number (127139752860).

Almost surely, 2^686554665417 is an apocalyptic number.

It is an amenable number.

686554665417 is a deficient number, since it is larger than the sum of its proper divisors (330563357463).

686554665417 is a wasteful number, since it uses less digits than its factorization.

686554665417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25427950580 (or 25427950574 counting only the distinct ones).

The product of its digits is 145152000, while the sum is 63.

The spelling of 686554665417 in words is "six hundred eighty-six billion, five hundred fifty-four million, six hundred sixty-five thousand, four hundred seventeen".