665126052044 has 24 divisors (see below), whose sum is σ = 1200370752000. Its totient is φ = 322321759760.

The previous prime is 665126052001. The next prime is 665126052047. The reversal of 665126052044 is 440250621566.

It is a junction number, because it is equal to n+sod(n) for n = 665126051992 and 665126052010.

It is not an unprimeable number, because it can be changed into a prime (665126052047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19830644 + ... + 19864155.

It is an arithmetic number, because the mean of its divisors is an integer number (50015448000).

Almost surely, 2^665126052044 is an apocalyptic number.

It is an amenable number.

665126052044 is a deficient number, since it is larger than the sum of its proper divisors (535244699956).

665126052044 is a wasteful number, since it uses less digits than its factorization.

665126052044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39694933 (or 39694931 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 665126052044 in words is "six hundred sixty-five billion, one hundred twenty-six million, fifty-two thousand, forty-four".