66041226 has 96 divisors (see below), whose sum is σ = 164324160. Its totient is φ = 19035648.

The previous prime is 66041219. The next prime is 66041267. The reversal of 66041226 is 62214066.

It is a happy number.

It is a super-2 number, since 2×66041226² = 8722887063166152, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66041226.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 214965 + ... + 215271.

It is an arithmetic number, because the mean of its divisors is an integer number (1711710).

Almost surely, 2^66041226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66041226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82162080).

66041226 is an abundant number, since it is smaller than the sum of its proper divisors (98282934).

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

66041226 is a wasteful number, since it uses less digits than its factorization.

66041226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388 (or 385 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 66041226 is about 8126.5752934431. The cubic root of 66041226 is about 404.2081280643.

The spelling of 66041226 in words is "sixty-six million, forty-one thousand, two hundred twenty-six".