663734 has 16 divisors (see below), whose sum is σ = 1064448. Its totient is φ = 309672.

The previous prime is 663713. The next prime is 663737. The reversal of 663734 is 437366.

It is a junction number, because it is equal to n+sod(n) for n = 663697 and 663706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663737) 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, 2009 + ... + 2315.

It is an arithmetic number, because the mean of its divisors is an integer number (66528).

2⁶⁶³⁷³⁴ is an apocalyptic number.

663734 is a deficient number, since it is larger than the sum of its proper divisors (400714).

663734 is a wasteful number, since it uses less digits than its factorization.

663734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379.

The product of its digits is 9072, while the sum is 29.

The square root of 663734 is about 814.6987173182. The cubic root of 663734 is about 87.2297621663.

The spelling of 663734 in words is "six hundred sixty-three thousand, seven hundred thirty-four".