25566010166 has 8 divisors (see below), whose sum is σ = 38349993240. Its totient is φ = 12782679088.

The previous prime is 25566010163. The next prime is 25566010219. The reversal of 25566010166 is 66101066552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25566010163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49031 + ... + 231378.

It is an arithmetic number, because the mean of its divisors is an integer number (4793749155).

Almost surely, 2^25566010166 is an apocalyptic number.

25566010166 is a deficient number, since it is larger than the sum of its proper divisors (12783983074).

25566010166 is a wasteful number, since it uses less digits than its factorization.

25566010166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325998.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 25566010166 in words is "twenty-five billion, five hundred sixty-six million, ten thousand, one hundred sixty-six".