664159 has 8 divisors (see below), whose sum is σ = 691488. Its totient is φ = 637440.

The previous prime is 664151. The next prime is 664177. The reversal of 664159 is 951466.

664159 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 664159 - 2³ = 664151 is a prime.

It is a super-2 number, since 2×664159² = 882214354562, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 664159.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3894 + ... + 4060.

It is an arithmetic number, because the mean of its divisors is an integer number (86436).

2⁶⁶⁴¹⁵⁹ is an apocalyptic number.

664159 is a deficient number, since it is larger than the sum of its proper divisors (27329).

664159 is a wasteful number, since it uses less digits than its factorization.

664159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305.

The product of its digits is 6480, while the sum is 31.

The square root of 664159 is about 814.9595081966. The cubic root of 664159 is about 87.2483764199.

Subtracting from 664159 its sum of digits (31), we obtain a triangular number (664128 = T₁₁₅₂).

It can be divided in two parts, 66 and 4159, that added together give a square (4225 = 65²).

The spelling of 664159 in words is "six hundred sixty-four thousand, one hundred fifty-nine".