3405666161437 has 4 divisors (see below), whose sum is σ = 3425352093180. Its totient is φ = 3385980229696.

The previous prime is 3405666161431. The next prime is 3405666161449. The reversal of 3405666161437 is 7341616665043.

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 2665216237401 + 740449924036 = 1632549^2 + 860494^2 .

It is a cyclic number.

It is not a de Polignac number, because 3405666161437 - 2³¹ = 3403518677789 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 (3405666161431) 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, 9842965612 + ... + 9842965957.

It is an arithmetic number, because the mean of its divisors is an integer number (856338023295).

Almost surely, 2^{3405666161437} is an apocalyptic number.

It is an amenable number.

3405666161437 is a deficient number, since it is larger than the sum of its proper divisors (19685931743).

3405666161437 is a wasteful number, since it uses less digits than its factorization.

3405666161437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19685931742.

The product of its (nonzero) digits is 6531840, while the sum is 52.

The spelling of 3405666161437 in words is "three trillion, four hundred five billion, six hundred sixty-six million, one hundred sixty-one thousand, four hundred thirty-seven".