25021065066 has 16 divisors (see below), whose sum is σ = 50055231744. Its totient is φ = 8338171424.

The previous prime is 25021065053. The next prime is 25021065067. The reversal of 25021065066 is 66056012052.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25021065067) 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, 520986 + ... + 566981.

It is an arithmetic number, because the mean of its divisors is an integer number (3128451984).

Almost surely, 2^25021065066 is an apocalyptic number.

25021065066 is an abundant number, since it is smaller than the sum of its proper divisors (25034166678).

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

25021065066 is a wasteful number, since it uses less digits than its factorization.

25021065066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091805.

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 25021065066 in words is "twenty-five billion, twenty-one million, sixty-five thousand, sixty-six".