66113449 has 2 divisors, whose sum is σ = 66113450. Its totient is φ = 66113448.

The previous prime is 66113363. The next prime is 66113461. The reversal of 66113449 is 94431166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53758224 + 12355225 = 7332^2 + 3515^2 .

It is a cyclic number.

It is not a de Polignac number, because 66113449 - 2²³ = 57724841 is a prime.

It is not a weakly prime, because it can be changed into another prime (66143449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33056724 + 33056725.

It is an arithmetic number, because the mean of its divisors is an integer number (33056725).

Almost surely, 2^66113449 is an apocalyptic number.

It is an amenable number.

66113449 is a deficient number, since it is larger than the sum of its proper divisors (1).

66113449 is an equidigital number, since it uses as much as digits as its factorization.

66113449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 34.

The square root of 66113449 is about 8131.0177099795. The cubic root of 66113449 is about 404.3554223629.

The spelling of 66113449 in words is "sixty-six million, one hundred thirteen thousand, four hundred forty-nine".