66128226 has 8 divisors (see below), whose sum is σ = 132256464. Its totient is φ = 22042740.

The previous prime is 66128221. The next prime is 66128267. The reversal of 66128226 is 62282166.

It is a sphenic number, since it is the product of 3 distinct primes.

66128226 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (66128221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5510680 + ... + 5510691.

It is an arithmetic number, because the mean of its divisors is an integer number (16532058).

Almost surely, 2^66128226 is an apocalyptic number.

66128226 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66128226 is a wasteful number, since it uses less digits than its factorization.

66128226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11021376.

The product of its digits is 13824, while the sum is 33.

The square root of 66128226 is about 8131.9263400501. The cubic root of 66128226 is about 404.3855459109.

The spelling of 66128226 in words is "sixty-six million, one hundred twenty-eight thousand, two hundred twenty-six".