664127 has 4 divisors (see below), whose sum is σ = 665856. Its totient is φ = 662400.

The previous prime is 664123. The next prime is 664133. The reversal of 664127 is 721466.

664127 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 664127 - 2² = 664123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664096 and 664105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2 + ... + 1152.

It is an arithmetic number, because the mean of its divisors is an integer number (166464).

2⁶⁶⁴¹²⁷ is an apocalyptic number.

664127 is a deficient number, since it is larger than the sum of its proper divisors (1729).

664127 is a wasteful number, since it uses less digits than its factorization.

664127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728.

The product of its digits is 2016, while the sum is 26.

The square root of 664127 is about 814.9398750828. The cubic root of 664127 is about 87.2469751526.

The spelling of 664127 in words is "six hundred sixty-four thousand, one hundred twenty-seven".