698664 has 32 divisors (see below), whose sum is σ = 1789920. Its totient is φ = 227136.

The previous prime is 698653. The next prime is 698669. The reversal of 698664 is 466896.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 698664.

It is not an unprimeable number, because it can be changed into a prime (698669) by changing a digit.

698664 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 694 + ... + 1370.

It is an arithmetic number, because the mean of its divisors is an integer number (55935).

2⁶⁹⁸⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 698664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (894960).

698664 is an abundant number, since it is smaller than the sum of its proper divisors (1091256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

698664 is a wasteful number, since it uses less digits than its factorization.

698664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729 (or 725 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 698664 is about 835.8612325021. The cubic root of 698664 is about 88.7338765923.

The spelling of 698664 in words is "six hundred ninety-eight thousand, six hundred sixty-four".