665334910646 has 32 divisors (see below), whose sum is σ = 1144187837760. Its totient is φ = 284241332736.

The previous prime is 665334910637. The next prime is 665334910651. The reversal of 665334910646 is 646019433566.

It is a happy number.

665334910646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6558800 + ... + 6659468.

It is an arithmetic number, because the mean of its divisors is an integer number (35755869930).

Almost surely, 2^665334910646 is an apocalyptic number.

665334910646 is a deficient number, since it is larger than the sum of its proper divisors (478852927114).

665334910646 is a wasteful number, since it uses less digits than its factorization.

665334910646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102168.

The product of its (nonzero) digits is 8398080, while the sum is 53.

The spelling of 665334910646 in words is "six hundred sixty-five billion, three hundred thirty-four million, nine hundred ten thousand, six hundred forty-six".