660929149 has 2 divisors, whose sum is σ = 660929150. Its totient is φ = 660929148.

The previous prime is 660929147. The next prime is 660929161. The reversal of 660929149 is 941929066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 607376025 + 53553124 = 24645^2 + 7318^2 .

It is a cyclic number.

It is not a de Polignac number, because 660929149 - 2¹ = 660929147 is a prime.

Together with 660929147, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 660929099 and 660929108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660929147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330464574 + 330464575.

It is an arithmetic number, because the mean of its divisors is an integer number (330464575).

Almost surely, 2^660929149 is an apocalyptic number.

It is an amenable number.

660929149 is a deficient number, since it is larger than the sum of its proper divisors (1).

660929149 is an equidigital number, since it uses as much as digits as its factorization.

660929149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 660929149 is about 25708.5423351850. The cubic root of 660929149 is about 871.0671491161.

The spelling of 660929149 in words is "six hundred sixty million, nine hundred twenty-nine thousand, one hundred forty-nine".