866850725 has 24 divisors (see below), whose sum is σ = 1161878760. Its totient is φ = 637758720.

The previous prime is 866850709. The next prime is 866850727. The reversal of 866850725 is 527058668.

It can be written as a sum of positive squares in 12 ways, for example, as 249924481 + 616926244 = 15809^2 + 24838^2 .

It is not a de Polignac number, because 866850725 - 2⁴ = 866850709 is a prime.

It is a super-3 number, since 3×866850725³ (a number of 28 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 866850725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866850727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85211 + ... + 94839.

It is an arithmetic number, because the mean of its divisors is an integer number (48411615).

Almost surely, 2^866850725 is an apocalyptic number.

It is an amenable number.

866850725 is a deficient number, since it is larger than the sum of its proper divisors (295028035).

866850725 is a wasteful number, since it uses less digits than its factorization.

866850725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9929 (or 9924 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 47.

The square root of 866850725 is about 29442.3287971587. The cubic root of 866850725 is about 953.4869913725.

The spelling of 866850725 in words is "eight hundred sixty-six million, eight hundred fifty thousand, seven hundred twenty-five".