66226481 has 4 divisors (see below), whose sum is σ = 66252912. Its totient is φ = 66200052.

The previous prime is 66226471. The next prime is 66226483. The reversal of 66226481 is 18462266.

66226481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18462266 = 2 ⋅9231133.

It is a cyclic number.

It is not a de Polignac number, because 66226481 - 2⁶ = 66226417 is a prime.

It is a super-2 number, since 2×66226481² = 8771893571286722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66226483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9011 + ... + 14616.

It is an arithmetic number, because the mean of its divisors is an integer number (16563228).

Almost surely, 2^66226481 is an apocalyptic number.

It is an amenable number.

66226481 is a deficient number, since it is larger than the sum of its proper divisors (26431).

66226481 is a wasteful number, since it uses less digits than its factorization.

66226481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26430.

The product of its digits is 27648, while the sum is 35.

The square root of 66226481 is about 8137.9654091179. The cubic root of 66226481 is about 404.5857289075.

The spelling of 66226481 in words is "sixty-six million, two hundred twenty-six thousand, four hundred eighty-one".