684550679065 has 8 divisors (see below), whose sum is σ = 896139070848. Its totient is φ = 497855039280.

The previous prime is 684550679063. The next prime is 684550679077. The reversal of 684550679065 is 560976055486.

684550679065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 684550679065 - 2¹ = 684550679063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 684550678994 and 684550679012.

It is not an unprimeable number, because it can be changed into a prime (684550679063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6223187937 + ... + 6223188046.

It is an arithmetic number, because the mean of its divisors is an integer number (112017383856).

Almost surely, 2^684550679065 is an apocalyptic number.

It is an amenable number.

684550679065 is a deficient number, since it is larger than the sum of its proper divisors (211588391783).

684550679065 is a wasteful number, since it uses less digits than its factorization.

684550679065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12446375999.

The product of its (nonzero) digits is 54432000, while the sum is 61.

The spelling of 684550679065 in words is "six hundred eighty-four billion, five hundred fifty million, six hundred seventy-nine thousand, sixty-five".