665222425548 has 24 divisors (see below), whose sum is σ = 1558369673280. Its totient is φ = 220857378000.

The previous prime is 665222425547. The next prime is 665222425559. The reversal of 665222425548 is 845524222566.

665222425548 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 665222425548.

It is not an unprimeable number, because it can be changed into a prime (665222425547) 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, 110425678 + ... + 110431701.

It is an arithmetic number, because the mean of its divisors is an integer number (64932069720).

Almost surely, 2^665222425548 is an apocalyptic number.

It is an amenable number.

665222425548 is an abundant number, since it is smaller than the sum of its proper divisors (893147247732).

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

665222425548 is a wasteful number, since it uses less digits than its factorization.

665222425548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220857637 (or 220857635 counting only the distinct ones).

The product of its digits is 9216000, while the sum is 51.

The spelling of 665222425548 in words is "six hundred sixty-five billion, two hundred twenty-two million, four hundred twenty-five thousand, five hundred forty-eight".