663722 has 8 divisors (see below), whose sum is σ = 999972. Its totient is φ = 330400.

The previous prime is 663713. The next prime is 663737. The reversal of 663722 is 227366.

It can be written as a sum of positive squares in 2 ways, for example, as 591361 + 72361 = 769^2 + 269^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a d-powerful number, because it can be written as 6³ + 6⁵ + 7³ + 3³ + 2¹⁷ + 2¹⁹ .

It is a junction number, because it is equal to n+sod(n) for n = 663691 and 663700.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29 + ... + 1152.

2⁶⁶³⁷²² is an apocalyptic number.

663722 is a deficient number, since it is larger than the sum of its proper divisors (336250).

663722 is a wasteful number, since it uses less digits than its factorization.

663722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464.

The product of its digits is 3024, while the sum is 26.

The square root of 663722 is about 814.6913525993. The cubic root of 663722 is about 87.2292364720.

The spelling of 663722 in words is "six hundred sixty-three thousand, seven hundred twenty-two".