660949 has 2 divisors, whose sum is σ = 660950. Its totient is φ = 660948.

The previous prime is 660941. The next prime is 660973. The reversal of 660949 is 949066.

660949 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., 552049 + 108900 = 743^2 + 330^2 .

It is a cyclic number.

It is not a de Polignac number, because 660949 - 2³ = 660941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330474 + 330475.

It is an arithmetic number, because the mean of its divisors is an integer number (330475).

2⁶⁶⁰⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

660949 is a deficient number, since it is larger than the sum of its proper divisors (1).

660949 is an equidigital number, since it uses as much as digits as its factorization.

660949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 660949 is about 812.9876997840. The cubic root of 660949 is about 87.1075869860.

The spelling of 660949 in words is "six hundred sixty thousand, nine hundred forty-nine".