665651250244 has 6 divisors (see below), whose sum is σ = 1164889687934. Its totient is φ = 332825625120.

The previous prime is 665651250233. The next prime is 665651250301. The reversal of 665651250244 is 442052156566.

It can be written as a sum of positive squares in only one way, i.e., 660822668100 + 4828582144 = 812910^2 + 69488^2 .

It is a junction number, because it is equal to n+sod(n) for n = 665651250194 and 665651250203.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83206406277 + ... + 83206406284.

Almost surely, 2^665651250244 is an apocalyptic number.

It is an amenable number.

665651250244 is a deficient number, since it is larger than the sum of its proper divisors (499238437690).

665651250244 is a wasteful number, since it uses less digits than its factorization.

665651250244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166412812565 (or 166412812563 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 46.

The spelling of 665651250244 in words is "six hundred sixty-five billion, six hundred fifty-one million, two hundred fifty thousand, two hundred forty-four".