3368507618621 has 4 divisors (see below), whose sum is σ = 3369190475292. Its totient is φ = 3367824761952.

The previous prime is 3368507618527. The next prime is 3368507618629. The reversal of 3368507618621 is 1268167058633.

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 1630948651396 + 1737558967225 = 1277086^2 + 1318165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3368507618621 is a prime.

It is a super-2 number, since 2×3368507618621² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3368507618629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341420936 + ... + 341430801.

It is an arithmetic number, because the mean of its divisors is an integer number (842297618823).

Almost surely, 2^{3368507618621} is an apocalyptic number.

It is an amenable number.

3368507618621 is a deficient number, since it is larger than the sum of its proper divisors (682856671).

3368507618621 is an equidigital number, since it uses as much as digits as its factorization.

3368507618621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682856670.

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 3368507618621 in words is "three trillion, three hundred sixty-eight billion, five hundred seven million, six hundred eighteen thousand, six hundred twenty-one".