66726226 has 16 divisors (see below), whose sum is σ = 116000640. Its totient is φ = 28193760.

The previous prime is 66726221. The next prime is 66726259. The reversal of 66726226 is 62262766.

It is not an unprimeable number, because it can be changed into a prime (66726221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32571 + ... + 34558.

It is an arithmetic number, because the mean of its divisors is an integer number (7250040).

Almost surely, 2^66726226 is an apocalyptic number.

66726226 is a deficient number, since it is larger than the sum of its proper divisors (49274414).

66726226 is a wasteful number, since it uses less digits than its factorization.

66726226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67209.

The product of its digits is 72576, while the sum is 37.

The square root of 66726226 is about 8168.6122444391. The cubic root of 66726226 is about 405.6008477289.

The spelling of 66726226 in words is "sixty-six million, seven hundred twenty-six thousand, two hundred twenty-six".