6603663066 has 256 divisors, whose sum is σ = 19063296000. Its totient is φ = 1498694400.

The previous prime is 6603662987. The next prime is 6603663071.

6603663066 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5590996 + ... + 5592176.

It is an arithmetic number, because the mean of its divisors is an integer number (74466000).

Almost surely, 2^6603663066 is an apocalyptic number.

6603663066 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 6603663066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9531648000).

6603663066 is an abundant number, since it is smaller than the sum of its proper divisors (12459632934).

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

6603663066 is a wasteful number, since it uses less digits than its factorization.

6603663066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250 (or 1236 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 42.

The square root of 6603663066 is about 81262.9255318808. The cubic root of 6603663066 is about 1876.1244162677.

The spelling of 6603663066 in words is "six billion, six hundred three million, six hundred sixty-three thousand, sixty-six".