660973 has 2 divisors, whose sum is σ = 660974. Its totient is φ = 660972.

The previous prime is 660949. The next prime is 660983. The reversal of 660973 is 379066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 660969 + 4 = 813^2 + 2^2 .

It is a cyclic number.

It is not a de Polignac number, because 660973 - 2⁵ = 660941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660923) 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, 330486 + 330487.

It is an arithmetic number, because the mean of its divisors is an integer number (330487).

2⁶⁶⁰⁹⁷³ is an apocalyptic number.

It is an amenable number.

660973 is a deficient number, since it is larger than the sum of its proper divisors (1).

660973 is an equidigital number, since it uses as much as digits as its factorization.

660973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 660973 is about 813.0024600209. The cubic root of 660973 is about 87.1086413067.

The spelling of 660973 in words is "six hundred sixty thousand, nine hundred seventy-three".