3663358862681 has 12 divisors (see below), whose sum is σ = 4292563811508. Its totient is φ = 3117102008832.

The previous prime is 3663358862573. The next prime is 3663358862689. The reversal of 3663358862681 is 1862688533663.

It can be written as a sum of positive squares in 2 ways, for example, as 1356954733456 + 2306404129225 = 1164884^2 + 1518685^2 .

It is a de Polignac number, because none of the positive numbers 2^k-3663358862681 is a prime.

It is a super-2 number, since 2×3663358862681² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3663358862689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 272848856 + ... + 272862281.

It is an arithmetic number, because the mean of its divisors is an integer number (357713650959).

Almost surely, 2^{3663358862681} is an apocalyptic number.

It is an amenable number.

3663358862681 is a deficient number, since it is larger than the sum of its proper divisors (629204948827).

3663358862681 is a wasteful number, since it uses less digits than its factorization.

3663358862681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545711288 (or 545711281 counting only the distinct ones).

The product of its digits is 179159040, while the sum is 65.

The spelling of 3663358862681 in words is "three trillion, six hundred sixty-three billion, three hundred fifty-eight million, eight hundred sixty-two thousand, six hundred eighty-one".