660349 has 2 divisors, whose sum is σ = 660350. Its totient is φ = 660348.

The previous prime is 660347. The next prime is 660367. The reversal of 660349 is 943066.

660349 = T₆₆₂ + T₆₆₃ + T₆₆₄.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 532900 + 127449 = 730^2 + 357^2 .

It is a cyclic number.

It is not a de Polignac number, because 660349 - 2¹ = 660347 is a prime.

Together with 660347, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330174 + 330175.

It is an arithmetic number, because the mean of its divisors is an integer number (330175).

2⁶⁶⁰³⁴⁹ is an apocalyptic number.

660349 is the 664-th centered triangular number.

It is an amenable number.

660349 is a deficient number, since it is larger than the sum of its proper divisors (1).

660349 is an equidigital number, since it uses as much as digits as its factorization.

660349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 660349 is about 812.6186067277. The cubic root of 660349 is about 87.0812206676.

The spelling of 660349 in words is "six hundred sixty thousand, three hundred forty-nine".