686419900663 has 16 divisors (see below), whose sum is σ = 813197422080. Its totient is φ = 566905088736.

The previous prime is 686419900657. The next prime is 686419900681. The reversal of 686419900663 is 366009914686.

It is not a de Polignac number, because 686419900663 - 2⁵ = 686419900631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 686419900598 and 686419900607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686419900643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3372781 + ... + 3570502.

It is an arithmetic number, because the mean of its divisors is an integer number (50824838880).

Almost surely, 2^686419900663 is an apocalyptic number.

686419900663 is a deficient number, since it is larger than the sum of its proper divisors (126777521417).

686419900663 is a wasteful number, since it uses less digits than its factorization.

686419900663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6943806.

The product of its (nonzero) digits is 10077696, while the sum is 58.

The spelling of 686419900663 in words is "six hundred eighty-six billion, four hundred nineteen million, nine hundred thousand, six hundred sixty-three".