3661210121663 has 8 divisors (see below), whose sum is σ = 3719681948160. Its totient is φ = 3602850851160.

The previous prime is 3661210121627. The next prime is 3661210121683.

3661210121663 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3661210121663 - 2¹⁰ = 3661210120639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3661210121683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28073423 + ... + 28203536.

It is an arithmetic number, because the mean of its divisors is an integer number (464960243520).

Almost surely, 2^{3661210121663} is an apocalyptic number.

3661210121663 is a deficient number, since it is larger than the sum of its proper divisors (58471826497).

3661210121663 is an equidigital number, since it uses as much as digits as its factorization.

3661210121663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56277997.

The product of its (nonzero) digits is 46656, while the sum is 38.

It can be divided in two parts, 3661210 and 121663, that added together give a palindrome (3782873).

The spelling of 3661210121663 in words is "three trillion, six hundred sixty-one billion, two hundred ten million, one hundred twenty-one thousand, six hundred sixty-three".