663427 has 4 divisors (see below), whose sum is σ = 665896. Its totient is φ = 660960.

The previous prime is 663409. The next prime is 663437. The reversal of 663427 is 724366.

663427 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 663427 - 2¹⁵ = 630659 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 663395 and 663404.

It is not an unprimeable number, because it can be changed into a prime (663407) 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, 774 + ... + 1387.

It is an arithmetic number, because the mean of its divisors is an integer number (166474).

2⁶⁶³⁴²⁷ is an apocalyptic number.

663427 is a deficient number, since it is larger than the sum of its proper divisors (2469).

663427 is a wasteful number, since it uses less digits than its factorization.

663427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2468.

The product of its digits is 6048, while the sum is 28.

The square root of 663427 is about 814.5102823169. The cubic root of 663427 is about 87.2163111619.

The spelling of 663427 in words is "six hundred sixty-three thousand, four hundred twenty-seven".