666032149 has 2 divisors, whose sum is σ = 666032150. Its totient is φ = 666032148.

The previous prime is 666032141. The next prime is 666032197. The reversal of 666032149 is 941230666.

It is a happy number.

666032149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 369331524 + 296700625 = 19218^2 + 17225^2 .

It is a cyclic number.

It is not a de Polignac number, because 666032149 - 2³ = 666032141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666032141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333016074 + 333016075.

It is an arithmetic number, because the mean of its divisors is an integer number (333016075).

Almost surely, 2^666032149 is an apocalyptic number.

It is an amenable number.

666032149 is a deficient number, since it is larger than the sum of its proper divisors (1).

666032149 is an equidigital number, since it uses as much as digits as its factorization.

666032149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 666032149 is about 25807.5986678342. The cubic root of 666032149 is about 873.3032256421.

It can be divided in two parts, 6660 and 32149, that added together give a square (38809 = 197²).

The spelling of 666032149 in words is "six hundred sixty-six million, thirty-two thousand, one hundred forty-nine".