66227131 has 2 divisors, whose sum is σ = 66227132. Its totient is φ = 66227130.

The previous prime is 66227113. The next prime is 66227137. The reversal of 66227131 is 13172266.

Together with previous prime (66227113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66227131 - 2¹³ = 66218939 is a prime.

It is a super-2 number, since 2×66227131² = 8772065760982322, 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 66227131.

It is not a weakly prime, because it can be changed into another prime (66227137) by changing a digit.

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 as a sum of consecutive naturals, namely, 33113565 + 33113566.

It is an arithmetic number, because the mean of its divisors is an integer number (33113566).

Almost surely, 2^66227131 is an apocalyptic number.

66227131 is a deficient number, since it is larger than the sum of its proper divisors (1).

66227131 is an equidigital number, since it uses as much as digits as its factorization.

66227131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 28.

The square root of 66227131 is about 8138.0053452919. The cubic root of 66227131 is about 404.5870525465.

Adding to 66227131 its reverse (13172266), we get a palindrome (79399397).

The spelling of 66227131 in words is "sixty-six million, two hundred twenty-seven thousand, one hundred thirty-one".