665050044 has 12 divisors (see below), whose sum is σ = 1551783464. Its totient is φ = 221683344.

The previous prime is 665050039. The next prime is 665050051. The reversal of 665050044 is 440050566.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×665050044² = 884583122048803872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 665049993 and 665050020.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27710407 + ... + 27710430.

Almost surely, 2^665050044 is an apocalyptic number.

It is an amenable number.

665050044 is an abundant number, since it is smaller than the sum of its proper divisors (886733420).

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

665050044 is a wasteful number, since it uses less digits than its factorization.

665050044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55420844 (or 55420842 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 665050044 is about 25788.5642097423. The cubic root of 665050044 is about 872.8737682071.

The spelling of 665050044 in words is "six hundred sixty-five million, fifty thousand, forty-four".