3476666821 has 18 divisors (see below), whose sum is σ = 3860932082. Its totient is φ = 3129751680.

The previous prime is 3476666807. The next prime is 3476666849. The reversal of 3476666821 is 1286666743.

It can be written as a sum of positive squares in 3 ways, for example, as 634284225 + 2842382596 = 25185^2 + 53314^2 .

It is not a de Polignac number, because 3476666821 - 2⁷ = 3476666693 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 (3476666881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 141511 + ... + 164251.

Almost surely, 2^3476666821 is an apocalyptic number.

It is an amenable number.

3476666821 is a deficient number, since it is larger than the sum of its proper divisors (384265261).

3476666821 is a wasteful number, since it uses less digits than its factorization.

3476666821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22821 (or 22781 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 49.

The square root of 3476666821 is about 58963.2667090283. The cubic root of 3476666821 is about 1514.9129949635.

The spelling of 3476666821 in words is "three billion, four hundred seventy-six million, six hundred sixty-six thousand, eight hundred twenty-one".