3206908404661 has 4 divisors (see below), whose sum is σ = 3453593666572. Its totient is φ = 2960223142752.

The previous prime is 3206908404631. The next prime is 3206908404703. The reversal of 3206908404661 is 1664048096023.

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 287423582161 + 2919484822500 = 536119^2 + 1708650^2 .

It is a cyclic number.

It is not a de Polignac number, because 3206908404661 - 2¹³ = 3206908396469 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 (3206908404611) 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 3 ways as a sum of consecutive naturals, for example, 123342630936 + ... + 123342630961.

It is an arithmetic number, because the mean of its divisors is an integer number (863398416643).

Almost surely, 2^{3206908404661} is an apocalyptic number.

It is an amenable number.

3206908404661 is a deficient number, since it is larger than the sum of its proper divisors (246685261911).

3206908404661 is a wasteful number, since it uses less digits than its factorization.

3206908404661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246685261910.

The product of its (nonzero) digits is 1492992, while the sum is 49.

The spelling of 3206908404661 in words is "three trillion, two hundred six billion, nine hundred eight million, four hundred four thousand, six hundred sixty-one".