66151449 has 72 divisors (see below), whose sum is σ = 122915520. Its totient is φ = 33374592.

The previous prime is 66151433. The next prime is 66151451. The reversal of 66151449 is 94415166.

66151449 is a `hidden beast` number, since 66 + 151 + 449 = 666.

66151449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66151449 - 2⁴ = 66151433 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66151429) 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 71 ways as a sum of consecutive naturals, for example, 1121182 + ... + 1121240.

It is an arithmetic number, because the mean of its divisors is an integer number (1707160).

Almost surely, 2^66151449 is an apocalyptic number.

It is an amenable number.

66151449 is a deficient number, since it is larger than the sum of its proper divisors (56764071).

66151449 is a wasteful number, since it uses less digits than its factorization.

With its successor (66151450) it forms an eRAP, since the sums of their prime factors are consecutive (159 and 160).

66151449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 119 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 66151449 is about 8133.3541051647. The cubic root of 66151449 is about 404.4328779252.

The spelling of 66151449 in words is "sixty-six million, one hundred fifty-one thousand, four hundred forty-nine".