660983 has 2 divisors, whose sum is σ = 660984. Its totient is φ = 660982.

The previous prime is 660973. The next prime is 661009. The reversal of 660983 is 389066.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 660983 - 2⁸ = 660727 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 660983.

It is not a weakly prime, because it can be changed into another prime (660923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330491 + 330492.

It is an arithmetic number, because the mean of its divisors is an integer number (330492).

2⁶⁶⁰⁹⁸³ is an apocalyptic number.

660983 is a deficient number, since it is larger than the sum of its proper divisors (1).

660983 is an equidigital number, since it uses as much as digits as its factorization.

660983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 660983 is about 813.0086100405. The cubic root of 660983 is about 87.1090805995.

The spelling of 660983 in words is "six hundred sixty thousand, nine hundred eighty-three".