66226121 has 8 divisors (see below), whose sum is σ = 71387904. Its totient is φ = 61074000.

The previous prime is 66226109. The next prime is 66226123. The reversal of 66226121 is 12162266.

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

It is not a de Polignac number, because 66226121 - 2¹⁰ = 66225097 is a prime.

It is a super-4 number, since 4×66226121⁴ (a number of 32 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66226123) 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, 18746 + ... + 21996.

It is an arithmetic number, because the mean of its divisors is an integer number (8923488).

Almost surely, 2^66226121 is an apocalyptic number.

It is an amenable number.

66226121 is a deficient number, since it is larger than the sum of its proper divisors (5161783).

66226121 is a wasteful number, since it uses less digits than its factorization.

66226121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4831.

The product of its digits is 1728, while the sum is 26.

The square root of 66226121 is about 8137.9432905372. The cubic root of 66226121 is about 404.5849958114.

Adding to 66226121 its reverse (12162266), we get a palindrome (78388387).

The spelling of 66226121 in words is "sixty-six million, two hundred twenty-six thousand, one hundred twenty-one".