663266340 has 144 divisors (see below), whose sum is σ = 2268362880. Its totient is φ = 160776000.

The previous prime is 663266323. The next prime is 663266381. The reversal of 663266340 is 43662366.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 663266295 and 663266304.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60265 + ... + 70415.

It is an arithmetic number, because the mean of its divisors is an integer number (15752520).

Almost surely, 2^663266340 is an apocalyptic number.

663266340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663266340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1134181440).

663266340 is an abundant number, since it is smaller than the sum of its proper divisors (1605096540).

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

663266340 is a wasteful number, since it uses less digits than its factorization.

663266340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10191 (or 10172 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 36.

The square root of 663266340 is about 25753.9577541006. The cubic root of 663266340 is about 872.0927029491.

The spelling of 663266340 in words is "six hundred sixty-three million, two hundred sixty-six thousand, three hundred forty".