25221065066 has 16 divisors (see below), whose sum is σ = 38369208384. Its totient is φ = 12431503584.

The previous prime is 25221065053. The next prime is 25221065083. The reversal of 25221065066 is 66056012252.

It is a super-2 number, since 2×25221065066² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253331 + ... + 338553.

It is an arithmetic number, because the mean of its divisors is an integer number (2398075524).

Almost surely, 2^25221065066 is an apocalyptic number.

25221065066 is a deficient number, since it is larger than the sum of its proper divisors (13148143318).

25221065066 is a wasteful number, since it uses less digits than its factorization.

25221065066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87325.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 25221065066 in words is "twenty-five billion, two hundred twenty-one million, sixty-five thousand, sixty-six".