663140326 has 4 divisors (see below), whose sum is σ = 994710492. Its totient is φ = 331570162.

The previous prime is 663140263. The next prime is 663140329. The reversal of 663140326 is 623041366.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663140329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165785080 + ... + 165785083.

It is an arithmetic number, because the mean of its divisors is an integer number (248677623).

Almost surely, 2^663140326 is an apocalyptic number.

663140326 is a deficient number, since it is larger than the sum of its proper divisors (331570166).

663140326 is a wasteful number, since it uses less digits than its factorization.

663140326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331570165.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 663140326 is about 25751.5111401253. The cubic root of 663140326 is about 872.0374698079.

The spelling of 663140326 in words is "six hundred sixty-three million, one hundred forty thousand, three hundred twenty-six".