660967 has 4 divisors (see below), whose sum is σ = 663136. Its totient is φ = 658800.

The previous prime is 660949. The next prime is 660973. The reversal of 660967 is 769066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 769066 = 2 ⋅384533.

It is a cyclic number.

It is not a de Polignac number, because 660967 - 2¹¹ = 658919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660917) 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 in 3 ways as a sum of consecutive naturals, for example, 534 + ... + 1267.

It is an arithmetic number, because the mean of its divisors is an integer number (165784).

2⁶⁶⁰⁹⁶⁷ is an apocalyptic number.

660967 is a deficient number, since it is larger than the sum of its proper divisors (2169).

660967 is a wasteful number, since it uses less digits than its factorization.

660967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2168.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 660967 is about 812.9987699868. The cubic root of 660967 is about 87.1083777289.

The spelling of 660967 in words is "six hundred sixty thousand, nine hundred sixty-seven".