25556651166 has 8 divisors (see below), whose sum is σ = 51113302344. Its totient is φ = 8518883720.

The previous prime is 25556651147. The next prime is 25556651167. The reversal of 25556651166 is 66115665552.

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

25556651166 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25556651167) 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, 2129720925 + ... + 2129720936.

It is an arithmetic number, because the mean of its divisors is an integer number (6389162793).

Almost surely, 2^25556651166 is an apocalyptic number.

25556651166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25556651166 is a wasteful number, since it uses less digits than its factorization.

25556651166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4259441866.

The product of its digits is 1620000, while the sum is 48.

The spelling of 25556651166 in words is "twenty-five billion, five hundred fifty-six million, six hundred fifty-one thousand, one hundred sixty-six".