6671561475 has 24 divisors (see below), whose sum is σ = 11098005952. Its totient is φ = 3536330400.

The previous prime is 6671561461. The next prime is 6671561489. The reversal of 6671561475 is 5741651766.

It is an interprime number because it is at equal distance from previous prime (6671561461) and next prime (6671561489).

It is not a de Polignac number, because 6671561475 - 2⁴ = 6671561459 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 260641 + ... + 285090.

Almost surely, 2^6671561475 is an apocalyptic number.

6671561475 is a deficient number, since it is larger than the sum of its proper divisors (4426444477).

6671561475 is a wasteful number, since it uses less digits than its factorization.

6671561475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545907 (or 545902 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 48.

The square root of 6671561475 is about 81679.6270498342. The cubic root of 6671561475 is about 1882.5325641755.

The spelling of 6671561475 in words is "six billion, six hundred seventy-one million, five hundred sixty-one thousand, four hundred seventy-five".