664235 has 16 divisors (see below), whose sum is σ = 937440. Its totient is φ = 445440.

The previous prime is 664211. The next prime is 664243. The reversal of 664235 is 532466.

It is not a de Polignac number, because 664235 - 2⁸ = 663979 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251 + ... + 1179.

It is an arithmetic number, because the mean of its divisors is an integer number (58590).

2⁶⁶⁴²³⁵ is an apocalyptic number.

664235 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

664235 is a deficient number, since it is larger than the sum of its proper divisors (273205).

664235 is a wasteful number, since it uses less digits than its factorization.

664235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958.

The product of its digits is 4320, while the sum is 26.

The square root of 664235 is about 815.0061349462. The cubic root of 664235 is about 87.2517042494.

Subtracting from 664235 its reverse (532466), we obtain a square (131769 = 363²).

The spelling of 664235 in words is "six hundred sixty-four thousand, two hundred thirty-five".