665130274424 has 128 divisors (see below), whose sum is σ = 1609396715520. Its totient is φ = 250096291200.

The previous prime is 665130274421. The next prime is 665130274433. The reversal of 665130274424 is 424472031566.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665130274421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6960779 + ... + 7055685.

It is an arithmetic number, because the mean of its divisors is an integer number (12573411840).

Almost surely, 2^665130274424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665130274424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (804698357760).

665130274424 is an abundant number, since it is smaller than the sum of its proper divisors (944266441096).

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

665130274424 is a wasteful number, since it uses less digits than its factorization.

665130274424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95329 (or 95325 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 44.

The spelling of 665130274424 in words is "six hundred sixty-five billion, one hundred thirty million, two hundred seventy-four thousand, four hundred twenty-four".