26663664 has 80 divisors (see below), whose sum is σ = 71995392. Its totient is φ = 8496384.

The previous prime is 26663657. The next prime is 26663671. The reversal of 26663664 is 46636662.

It is an interprime number because it is at equal distance from previous prime (26663657) and next prime (26663671).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119457 + ... + 119679.

Almost surely, 2^26663664 is an apocalyptic number.

26663664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26663664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35997696).

26663664 is an abundant number, since it is smaller than the sum of its proper divisors (45331728).

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

26663664 is a wasteful number, since it uses less digits than its factorization.

26663664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334 (or 328 counting only the distinct ones).

The product of its digits is 186624, while the sum is 39.

The square root of 26663664 is about 5163.6870548088. The cubic root of 26663664 is about 298.7491025457.

It can be divided in two parts, 2 and 6663664, that added together give a palindrome (6663666).

The spelling of 26663664 in words is "twenty-six million, six hundred sixty-three thousand, six hundred sixty-four".