26666220 has 96 divisors (see below), whose sum is σ = 86059008. Its totient is φ = 6043392.

The previous prime is 26666209. The next prime is 26666221. The reversal of 26666220 is 2266662.

It is a super-2 number, since 2×26666220² = 1422174578176800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26666221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72477 + ... + 72843.

It is an arithmetic number, because the mean of its divisors is an integer number (896448).

Almost surely, 2^26666220 is an apocalyptic number.

26666220 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 26666220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43029504).

26666220 is an abundant number, since it is smaller than the sum of its proper divisors (59392788).

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

26666220 is a wasteful number, since it uses less digits than its factorization.

26666220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559 (or 557 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 26666220 is about 5163.9345464481. The cubic root of 26666220 is about 298.7586483494.

The spelling of 26666220 in words is "twenty-six million, six hundred sixty-six thousand, two hundred twenty".