663333386661 has 24 divisors (see below), whose sum is σ = 1046151546336. Its totient is φ = 401674489440.

The previous prime is 663333386629. The next prime is 663333386687. The reversal of 663333386661 is 166683333366.

It is not a de Polignac number, because 663333386661 - 2⁵ = 663333386629 is a prime.

It is a super-2 number, since 2×663333386661² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 663333386598 and 663333386607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663333381661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2765490 + ... + 2995763.

It is an arithmetic number, because the mean of its divisors is an integer number (43589647764).

Almost surely, 2^663333386661 is an apocalyptic number.

It is an amenable number.

663333386661 is a deficient number, since it is larger than the sum of its proper divisors (382818159675).

663333386661 is a wasteful number, since it uses less digits than its factorization.

663333386661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5762433 (or 5762430 counting only the distinct ones).

The product of its digits is 15116544, while the sum is 54.

The spelling of 663333386661 in words is "six hundred sixty-three billion, three hundred thirty-three million, three hundred eighty-six thousand, six hundred sixty-one".