25550330166 has 48 divisors (see below), whose sum is σ = 59195886048. Its totient is φ = 7936416000.

The previous prime is 25550330159. The next prime is 25550330167. The reversal of 25550330166 is 66103305552.

It is a self number, because there is not a number n which added to its sum of digits gives 25550330166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25550330167) 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, 382450 + ... + 444261.

It is an arithmetic number, because the mean of its divisors is an integer number (1233247626).

Almost surely, 2^25550330166 is an apocalyptic number.

25550330166 is an abundant number, since it is smaller than the sum of its proper divisors (33645555882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25550330166 is a wasteful number, since it uses less digits than its factorization.

25550330166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826837 (or 826834 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The spelling of 25550330166 in words is "twenty-five billion, five hundred fifty million, three hundred thirty thousand, one hundred sixty-six".