866055425 has 6 divisors (see below), whose sum is σ = 1073908758. Its totient is φ = 692844320.

The previous prime is 866055403. The next prime is 866055427. The reversal of 866055425 is 524550668.

It can be written as a sum of positive squares in 3 ways, for example, as 193794241 + 672261184 = 13921^2 + 25928^2 .

It is not a de Polignac number, because 866055425 - 2¹⁰ = 866054401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866055427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17321084 + ... + 17321133.

It is an arithmetic number, because the mean of its divisors is an integer number (178984793).

Almost surely, 2^866055425 is an apocalyptic number.

It is an amenable number.

866055425 is a deficient number, since it is larger than the sum of its proper divisors (207853333).

866055425 is a wasteful number, since it uses less digits than its factorization.

866055425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34642227 (or 34642222 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 41.

The square root of 866055425 is about 29428.8196331419. The cubic root of 866055425 is about 953.1953070774.

The spelling of 866055425 in words is "eight hundred sixty-six million, fifty-five thousand, four hundred twenty-five".