25002421166 has 16 divisors (see below), whose sum is σ = 39102359040. Its totient is φ = 11975090400.

The previous prime is 25002421163. The next prime is 25002421211. The reversal of 25002421166 is 66112420052.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25002421163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1689785 + ... + 1704516.

It is an arithmetic number, because the mean of its divisors is an integer number (2443897440).

Almost surely, 2^25002421166 is an apocalyptic number.

25002421166 is a deficient number, since it is larger than the sum of its proper divisors (14099937874).

25002421166 is a wasteful number, since it uses less digits than its factorization.

25002421166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3394459.

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 25002421166 in words is "twenty-five billion, two million, four hundred twenty-one thousand, one hundred sixty-six".