665203633846 has 4 divisors (see below), whose sum is σ = 997805450772. Its totient is φ = 332601816922.

The previous prime is 665203633817. The next prime is 665203633873. The reversal of 665203633846 is 648336302566.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-4 number, since 4×665203633846⁴ (a number of 48 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 665203633793 and 665203633802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166300908460 + ... + 166300908463.

It is an arithmetic number, because the mean of its divisors is an integer number (249451362693).

Almost surely, 2^665203633846 is an apocalyptic number.

665203633846 is a deficient number, since it is larger than the sum of its proper divisors (332601816926).

665203633846 is a wasteful number, since it uses less digits than its factorization.

665203633846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332601816925.

The product of its (nonzero) digits is 11197440, while the sum is 52.

The spelling of 665203633846 in words is "six hundred sixty-five billion, two hundred three million, six hundred thirty-three thousand, eight hundred forty-six".