665247002784 has 192 divisors, whose sum is σ = 2151043050240. Its totient is φ = 175304171520.

The previous prime is 665247002759. The next prime is 665247002789. The reversal of 665247002784 is 487200742566.

665247002784 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (665247002789) 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, 10705564 + ... + 10767524.

It is an arithmetic number, because the mean of its divisors is an integer number (11203349220).

Almost surely, 2^665247002784 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 665247002784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1075521525120).

665247002784 is an abundant number, since it is smaller than the sum of its proper divisors (1485796047456).

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

665247002784 is a wasteful number, since it uses less digits than its factorization.

665247002784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63223 (or 63215 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 51.

The spelling of 665247002784 in words is "six hundred sixty-five billion, two hundred forty-seven million, two thousand, seven hundred eighty-four".