665346711384 has 128 divisors (see below), whose sum is σ = 1852277068800. Its totient is φ = 221291896320.

The previous prime is 665346711383. The next prime is 665346711397. The reversal of 665346711384 is 483117643566.

665346711384 is a `hidden beast` number, since 6 + 6 + 534 + 6 + 71 + 1 + 38 + 4 = 666.

665346711384 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 665346711384.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665346711383) 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, 307887264 + ... + 307889424.

It is an arithmetic number, because the mean of its divisors is an integer number (14470914600).

Almost surely, 2^665346711384 is an apocalyptic number.

It is an amenable number.

665346711384 is an abundant number, since it is smaller than the sum of its proper divisors (1186930357416).

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

665346711384 is a wasteful number, since it uses less digits than its factorization.

665346711384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4670 (or 4660 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The spelling of 665346711384 in words is "six hundred sixty-five billion, three hundred forty-six million, seven hundred eleven thousand, three hundred eighty-four".