6671565223251 has 4 divisors (see below), whose sum is σ = 8895420297672. Its totient is φ = 4447710148832.

The previous prime is 6671565223223. The next prime is 6671565223283. The reversal of 6671565223251 is 1523225651766.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6671565223251 - 2²³ = 6671556834643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6671565223194 and 6671565223203.

It is not an unprimeable number, because it can be changed into a prime (6671565223291) 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 3 ways as a sum of consecutive naturals, for example, 1111927537206 + ... + 1111927537211.

It is an arithmetic number, because the mean of its divisors is an integer number (2223855074418).

Almost surely, 2^{6671565223251} is an apocalyptic number.

6671565223251 is a deficient number, since it is larger than the sum of its proper divisors (2223855074421).

6671565223251 is a wasteful number, since it uses less digits than its factorization.

6671565223251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223855074420.

The product of its digits is 4536000, while the sum is 51.

The spelling of 6671565223251 in words is "six trillion, six hundred seventy-one billion, five hundred sixty-five million, two hundred twenty-three thousand, two hundred fifty-one".