665305748073144 has 96 divisors (see below), whose sum is σ = 1816664167718400. Its totient is φ = 219950949303360.

The previous prime is 665305748073139. The next prime is 665305748073157. The reversal of 665305748073144 is 441370847503566.

665305748073144 is a `hidden beast` number, since 6 + 6 + 5 + 3 + 0 + 5 + 7 + 480 + 7 + 3 + 144 = 666.

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, 23622634 + ... + 43458489.

It is an arithmetic number, because the mean of its divisors is an integer number (18923585080400).

Almost surely, 2^{665305748073144} is an apocalyptic number.

It is an amenable number.

665305748073144 is an abundant number, since it is smaller than the sum of its proper divisors (1151358419645256).

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

665305748073144 is a wasteful number, since it uses less digits than its factorization.

665305748073144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67082265 (or 67082258 counting only the distinct ones).

The product of its (nonzero) digits is 203212800, while the sum is 63.

The spelling of 665305748073144 in words is "six hundred sixty-five trillion, three hundred five billion, seven hundred forty-eight million, seventy-three thousand, one hundred forty-four".