66471133 has 2 divisors, whose sum is σ = 66471134. Its totient is φ = 66471132.

The previous prime is 66471121. The next prime is 66471157. The reversal of 66471133 is 33117466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49182169 + 17288964 = 7013^2 + 4158^2 .

It is a cyclic number.

It is not a de Polignac number, because 66471133 - 2¹³ = 66462941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66471095 and 66471104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66471193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33235566 + 33235567.

It is an arithmetic number, because the mean of its divisors is an integer number (33235567).

Almost surely, 2^66471133 is an apocalyptic number.

It is an amenable number.

66471133 is a deficient number, since it is larger than the sum of its proper divisors (1).

66471133 is an equidigital number, since it uses as much as digits as its factorization.

66471133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 31.

The square root of 66471133 is about 8152.9830736976. The cubic root of 66471133 is about 405.0833197473.

Adding to 66471133 its reverse (33117466), we get a palindrome (99588599).

The spelling of 66471133 in words is "sixty-six million, four hundred seventy-one thousand, one hundred thirty-three".