663129 has 6 divisors (see below), whose sum is σ = 957866. Its totient is φ = 442080.

The previous prime is 663127. The next prime is 663149. The reversal of 663129 is 921366.

It is a happy number.

663129 is a `hidden beast` number, since 6 + 631 + 29 = 666.

663129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 435600 + 227529 = 660^2 + 477^2 .

It is not a de Polignac number, because 663129 - 2¹ = 663127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663127) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36832 + ... + 36849.

2⁶⁶³¹²⁹ is an apocalyptic number.

It is an amenable number.

663129 is a deficient number, since it is larger than the sum of its proper divisors (294737).

663129 is a wasteful number, since it uses less digits than its factorization.

663129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73687 (or 73684 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 663129 is about 814.3273297637. The cubic root of 663129 is about 87.2032505171.

The spelling of 663129 in words is "six hundred sixty-three thousand, one hundred twenty-nine".