3477091661 has 4 divisors (see below), whose sum is σ = 3477447324. Its totient is φ = 3476736000.

The previous prime is 3477091643. The next prime is 3477091691. The reversal of 3477091661 is 1661907743.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1661907743 = 17 ⋅97759279.

It can be written as a sum of positive squares in 2 ways, for example, as 1067263561 + 2409828100 = 32669^2 + 49090^2 .

It is a cyclic number.

It is not a de Polignac number, because 3477091661 - 2¹⁰ = 3477090637 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 (3477091601) 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, 162740 + ... + 182861.

It is an arithmetic number, because the mean of its divisors is an integer number (869361831).

Almost surely, 2^3477091661 is an apocalyptic number.

It is an amenable number.

3477091661 is a deficient number, since it is larger than the sum of its proper divisors (355663).

3477091661 is a wasteful number, since it uses less digits than its factorization.

3477091661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355662.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 3477091661 is about 58966.8691809223. The cubic root of 3477091661 is about 1514.9746986447.

The spelling of 3477091661 in words is "three billion, four hundred seventy-seven million, ninety-one thousand, six hundred sixty-one".