7871505966 has 20 divisors (see below), whose sum is σ = 17638004472. Its totient is φ = 2623835268.

The previous prime is 7871505913. The next prime is 7871505979. The reversal of 7871505966 is 6695051787.

7871505966 is a `hidden beast` number, since 7 + 8 + 71 + 505 + 9 + 66 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 24294610 + ... + 24294933.

Almost surely, 2^7871505966 is an apocalyptic number.

7871505966 is an abundant number, since it is smaller than the sum of its proper divisors (9766498506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7871505966 is a wasteful number, since it uses less digits than its factorization.

7871505966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48589557 (or 48589548 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 54.

The square root of 7871505966 is about 88721.5079109908. The cubic root of 7871505966 is about 1989.2343178558.

The spelling of 7871505966 in words is "seven billion, eight hundred seventy-one million, five hundred five thousand, nine hundred sixty-six".