684071550664 has 16 divisors (see below), whose sum is σ = 1287744257520. Its totient is φ = 340673082000.

The previous prime is 684071550653. The next prime is 684071550671. The reversal of 684071550664 is 466055170486.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170334534 + ... + 170338549.

It is an arithmetic number, because the mean of its divisors is an integer number (80484016095).

Almost surely, 2^684071550664 is an apocalyptic number.

It is an amenable number.

684071550664 is a deficient number, since it is larger than the sum of its proper divisors (603672706856).

684071550664 is a wasteful number, since it uses less digits than its factorization.

684071550664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340673340 (or 340673336 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 52.

The spelling of 684071550664 in words is "six hundred eighty-four billion, seventy-one million, five hundred fifty thousand, six hundred sixty-four".