7851871966 has 8 divisors (see below), whose sum is σ = 11943692784. Its totient is φ = 3870641040.

The previous prime is 7851871949. The next prime is 7851871981. The reversal of 7851871966 is 6691781587.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 7851871966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27647295 + ... + 27647578.

It is an arithmetic number, because the mean of its divisors is an integer number (1492961598).

Almost surely, 2^7851871966 is an apocalyptic number.

7851871966 is a deficient number, since it is larger than the sum of its proper divisors (4091820818).

7851871966 is a wasteful number, since it uses less digits than its factorization.

7851871966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55294946.

The product of its digits is 5080320, while the sum is 58.

The square root of 7851871966 is about 88610.7892189207. The cubic root of 7851871966 is about 1987.5790164437.

The spelling of 7851871966 in words is "seven billion, eight hundred fifty-one million, eight hundred seventy-one thousand, nine hundred sixty-six".