659967 has 16 divisors (see below), whose sum is σ = 1097472. Its totient is φ = 342720.

The previous prime is 659963. The next prime is 659983. The reversal of 659967 is 769956.

It is not a de Polignac number, because 659967 - 2² = 659963 is a prime.

659967 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1198 + ... + 1659.

It is an arithmetic number, because the mean of its divisors is an integer number (68592).

2⁶⁵⁹⁹⁶⁷ is an apocalyptic number.

659967 is a deficient number, since it is larger than the sum of its proper divisors (437505).

659967 is a wasteful number, since it uses less digits than its factorization.

659967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878.

The product of its digits is 102060, while the sum is 42.

The square root of 659967 is about 812.3835301137. The cubic root of 659967 is about 87.0644257896.

It can be divided in two parts, 6599 and 67, that added together give a palindrome (6666).

The spelling of 659967 in words is "six hundred fifty-nine thousand, nine hundred sixty-seven".