8555166425 has 24 divisors (see below), whose sum is σ = 11475765504. Its totient is φ = 6289277760.

The previous prime is 8555166421. The next prime is 8555166449. The reversal of 8555166425 is 5246615558.

It is not a de Polignac number, because 8555166425 - 2² = 8555166421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8555166425.

It is not an unprimeable number, because it can be changed into a prime (8555166421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13454 + ... + 131496.

It is an arithmetic number, because the mean of its divisors is an integer number (478156896).

Almost surely, 2^8555166425 is an apocalyptic number.

It is an amenable number.

8555166425 is a deficient number, since it is larger than the sum of its proper divisors (2920599079).

8555166425 is a wasteful number, since it uses less digits than its factorization.

8555166425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118289 (or 118284 counting only the distinct ones).

The product of its digits is 1440000, while the sum is 47.

The square root of 8555166425 is about 92494.1426523864. The cubic root of 8555166425 is about 2045.2331379758.

The spelling of 8555166425 in words is "eight billion, five hundred fifty-five million, one hundred sixty-six thousand, four hundred twenty-five".