663369340 has 48 divisors (see below), whose sum is σ = 1431126144. Its totient is φ = 258137600.

The previous prime is 663369281. The next prime is 663369349. The reversal of 663369340 is 43963366.

It is a junction number, because it is equal to n+sod(n) for n = 663369293 and 663369302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663369349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 352482 + ... + 354358.

It is an arithmetic number, because the mean of its divisors is an integer number (29815128).

Almost surely, 2^663369340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663369340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (715563072).

663369340 is an abundant number, since it is smaller than the sum of its proper divisors (767756804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663369340 is a wasteful number, since it uses less digits than its factorization.

663369340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358 (or 2356 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 40.

The square root of 663369340 is about 25755.9573691214. The cubic root of 663369340 is about 872.1378436383.

The spelling of 663369340 in words is "six hundred sixty-three million, three hundred sixty-nine thousand, three hundred forty".