665629006704 has 120 divisors (see below), whose sum is σ = 1816528020480. Its totient is φ = 209999316096.

The previous prime is 665629006699. The next prime is 665629006711. The reversal of 665629006704 is 407600926566.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18817867 + ... + 18853205.

It is an arithmetic number, because the mean of its divisors is an integer number (15137733504).

Almost surely, 2^665629006704 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 665629006704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (908264010240).

665629006704 is an abundant number, since it is smaller than the sum of its proper divisors (1150899013776).

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

665629006704 is a wasteful number, since it uses less digits than its factorization.

665629006704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36475 (or 36450 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 51.

The spelling of 665629006704 in words is "six hundred sixty-five billion, six hundred twenty-nine million, six thousand, seven hundred four".