6671561476 has 24 divisors (see below), whose sum is σ = 12091023000. Its totient is φ = 3217234944.

The previous prime is 6671561461. The next prime is 6671561489. The reversal of 6671561476 is 6741651766.

It can be written as a sum of positive squares in 4 ways, for example, as 800324100 + 5871237376 = 28290^2 + 76624^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76810 + ... + 138718.

It is an arithmetic number, because the mean of its divisors is an integer number (503792625).

Almost surely, 2^6671561476 is an apocalyptic number.

It is an amenable number.

6671561476 is a deficient number, since it is larger than the sum of its proper divisors (5419461524).

6671561476 is a wasteful number, since it uses less digits than its factorization.

6671561476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62871 (or 62869 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 49.

The square root of 6671561476 is about 81679.6270559556. The cubic root of 6671561476 is about 1882.5325642696.

The spelling of 6671561476 in words is "six billion, six hundred seventy-one million, five hundred sixty-one thousand, four hundred seventy-six".