660373 has 6 divisors (see below), whose sum is σ = 768246. Its totient is φ = 565992.

The previous prime is 660367. The next prime is 660377. The reversal of 660373 is 373066.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 603729 + 56644 = 777^2 + 238^2 .

It is not a de Polignac number, because 660373 - 2¹⁷ = 529301 is a prime.

It is a Duffinian number.

660373 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660377) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6690 + ... + 6787.

It is an arithmetic number, because the mean of its divisors is an integer number (128041).

2⁶⁶⁰³⁷³ is an apocalyptic number.

It is an amenable number.

660373 is a deficient number, since it is larger than the sum of its proper divisors (107873).

660373 is a wasteful number, since it uses less digits than its factorization.

660373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13491 (or 13484 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 25.

The square root of 660373 is about 812.6333736686. The cubic root of 660373 is about 87.0822756270.

The spelling of 660373 in words is "six hundred sixty thousand, three hundred seventy-three".