866248875 has 24 divisors (see below), whose sum is σ = 1561560000. Its totient is φ = 461998800.

The previous prime is 866248813. The next prime is 866248891. The reversal of 866248875 is 578842668.

866248875 is a `hidden beast` number, since 8 + 6 + 624 + 8 + 8 + 7 + 5 = 666.

It is not a de Polignac number, because 866248875 - 2⁶ = 866248811 is a prime.

It is a super-2 number, since 2×866248875² = 1500774226877531250, which contains 22 as substring.

It is a congruent 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, 383875 + ... + 386124.

It is an arithmetic number, because the mean of its divisors is an integer number (65065000).

Almost surely, 2^866248875 is an apocalyptic number.

866248875 is a deficient number, since it is larger than the sum of its proper divisors (695311125).

866248875 is a wasteful number, since it uses less digits than its factorization.

866248875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770020 (or 770007 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 54.

The square root of 866248875 is about 29432.1061937470. The cubic root of 866248875 is about 953.2662732454.

The spelling of 866248875 in words is "eight hundred sixty-six million, two hundred forty-eight thousand, eight hundred seventy-five".