12698664 has 64 divisors (see below), whose sum is σ = 35043840. Its totient is φ = 3802560.

The previous prime is 12698663. The next prime is 12698681. The reversal of 12698664 is 46689621.

It is a super-2 number, since 2×12698664² = 322512134769792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12698663) 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, 26959 + ... + 27425.

It is an arithmetic number, because the mean of its divisors is an integer number (547560).

Almost surely, 2^12698664 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 12698664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17521920).

12698664 is an abundant number, since it is smaller than the sum of its proper divisors (22345176).

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

12698664 is a wasteful number, since it uses less digits than its factorization.

12698664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590 (or 586 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 12698664 is about 3563.5184859911. The cubic root of 12698664 is about 233.3024739234.

It can be divided in two parts, 126 and 98664, that added together give a triangular number (98790 = T₄₄₄).

The spelling of 12698664 in words is "twelve million, six hundred ninety-eight thousand, six hundred sixty-four".