666235 has 8 divisors (see below), whose sum is σ = 841680. Its totient is φ = 504864.

The previous prime is 666233. The next prime is 666269. The reversal of 666235 is 532666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 666235 - 2¹ = 666233 is a prime.

It is a super-3 number, since 3×666235³ = 887163339997583625, which contains 333 as substring.

It is an Ulam number.

666235 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (666233) 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 7 ways as a sum of consecutive naturals, for example, 3412 + ... + 3601.

It is an arithmetic number, because the mean of its divisors is an integer number (105210).

2⁶⁶⁶²³⁵ is an apocalyptic number.

666235 is a deficient number, since it is larger than the sum of its proper divisors (175445).

666235 is a wasteful number, since it uses less digits than its factorization.

666235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7037.

The product of its digits is 6480, while the sum is 28.

The square root of 666235 is about 816.2321973556. The cubic root of 666235 is about 87.3391876243.

The spelling of 666235 in words is "six hundred sixty-six thousand, two hundred thirty-five".