3521662410661 has 4 divisors (see below), whose sum is σ = 3616842475852. Its totient is φ = 3426482345472.

The previous prime is 3521662410611. The next prime is 3521662410677. The reversal of 3521662410661 is 1660142661253.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3299072832225 + 222589578436 = 1816335^2 + 471794^2 .

It is a cyclic number.

It is not a de Polignac number, because 3521662410661 - 2¹³ = 3521662402469 is a prime.

It is a super-2 number, since 2×3521662410661² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3521662410611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47590032540 + ... + 47590032613.

It is an arithmetic number, because the mean of its divisors is an integer number (904210618963).

Almost surely, 2^{3521662410661} is an apocalyptic number.

It is an amenable number.

3521662410661 is a deficient number, since it is larger than the sum of its proper divisors (95180065191).

3521662410661 is an equidigital number, since it uses as much as digits as its factorization.

3521662410661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95180065190.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 3521662410661 in words is "three trillion, five hundred twenty-one billion, six hundred sixty-two million, four hundred ten thousand, six hundred sixty-one".