25526664 has 64 divisors (see below), whose sum is σ = 71832000. Its totient is φ = 8503056.

The previous prime is 25526663. The next prime is 25526681. The reversal of 25526664 is 46662552.

It is a super-2 number, since 2×25526664² = 1303221149937792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (25526663) 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, 16767 + ... + 18225.

It is an arithmetic number, because the mean of its divisors is an integer number (1122375).

Almost surely, 2^25526664 is an apocalyptic number.

25526664 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 25526664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35916000).

25526664 is an abundant number, since it is smaller than the sum of its proper divisors (46305336).

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

25526664 is an equidigital number, since it uses as much as digits as its factorization.

25526664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486 (or 1464 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 25526664 is about 5052.3919087893. The cubic root of 25526664 is about 294.4408214208.

It can be divided in two parts, 2552666 and 4, that added together give a triangular number (2552670 = T₂₂₅₉).

The spelling of 25526664 in words is "twenty-five million, five hundred twenty-six thousand, six hundred sixty-four".