866080625 has 20 divisors (see below), whose sum is σ = 1084106100. Its totient is φ = 691680000.

The previous prime is 866080603. The next prime is 866080637. The reversal of 866080625 is 526080668.

It can be written as a sum of positive squares in 10 ways, for example, as 257570401 + 608510224 = 16049^2 + 24668^2 .

It is not a de Polignac number, because 866080625 - 2⁶ = 866080561 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 654965 + ... + 656285.

It is an arithmetic number, because the mean of its divisors is an integer number (54205305).

Almost surely, 2^866080625 is an apocalyptic number.

It is an amenable number.

866080625 is a deficient number, since it is larger than the sum of its proper divisors (218025475).

866080625 is a wasteful number, since it uses less digits than its factorization.

866080625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2390 (or 2375 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 866080625 is about 29429.2477817562. The cubic root of 866080625 is about 953.2045521704.

The spelling of 866080625 in words is "eight hundred sixty-six million, eighty thousand, six hundred twenty-five".