25520165466 has 16 divisors (see below), whose sum is σ = 51243681888. Its totient is φ = 8472830000.

The previous prime is 25520165449. The next prime is 25520165479. The reversal of 25520165466 is 66456102552.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8471325 + ... + 8474336.

It is an arithmetic number, because the mean of its divisors is an integer number (3202730118).

Almost surely, 2^25520165466 is an apocalyptic number.

25520165466 is an abundant number, since it is smaller than the sum of its proper divisors (25723516422).

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

25520165466 is a wasteful number, since it uses less digits than its factorization.

25520165466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16945917.

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 25520165466 in words is "twenty-five billion, five hundred twenty million, one hundred sixty-five thousand, four hundred sixty-six".