26665920 has 168 divisors, whose sum is σ = 94146624. Its totient is φ = 6924288.

The previous prime is 26665907. The next prime is 26665963. The reversal of 26665920 is 2956662.

It is a super-2 number, since 2×26665920² = 1422142578892800, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135262 + ... + 135458.

Almost surely, 2^26665920 is an apocalyptic number.

26665920 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 26665920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47073312).

26665920 is an abundant number, since it is smaller than the sum of its proper divisors (67480704).

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

26665920 is a wasteful number, since it uses less digits than its factorization.

26665920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 26665920 is about 5163.9054987480. The cubic root of 26665920 is about 298.7575279815.

The spelling of 26665920 in words is "twenty-six million, six hundred sixty-five thousand, nine hundred twenty".