26665000 has 40 divisors (see below), whose sum is σ = 62487810. Its totient is φ = 10664000.

The previous prime is 26664977. The next prime is 26665013. The reversal of 26665000 is 56662.

It can be written as a sum of positive squares in 5 ways, for example, as 5560164 + 21104836 = 2358^2 + 4594^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×26665000² = 1422044450000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2334 + ... + 7666.

Almost surely, 2^26665000 is an apocalyptic number.

26665000 is a gapful number since it is divisible by the number (20) 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 26665000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31243905).

26665000 is an abundant number, since it is smaller than the sum of its proper divisors (35822810).

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

26665000 is an equidigital number, since it uses as much as digits as its factorization.

26665000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5359 (or 5340 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 26665000 is about 5163.8164181156. The cubic root of 26665000 is about 298.7540921342.

The spelling of 26665000 in words is "twenty-six million, six hundred sixty-five thousand".