665629006703 has 4 divisors (see below), whose sum is σ = 666015777168. Its totient is φ = 665242236240.

The previous prime is 665629006699. The next prime is 665629006711. The reversal of 665629006703 is 307600926566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 307600926566 = 2 ⋅153800463283.

It is a cyclic number.

It is not a de Polignac number, because 665629006703 - 2² = 665629006699 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665629006753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193382651 + ... + 193386092.

It is an arithmetic number, because the mean of its divisors is an integer number (166503944292).

Almost surely, 2^665629006703 is an apocalyptic number.

665629006703 is a deficient number, since it is larger than the sum of its proper divisors (386770465).

665629006703 is a wasteful number, since it uses less digits than its factorization.

665629006703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386770464.

The product of its (nonzero) digits is 2449440, while the sum is 50.

The spelling of 665629006703 in words is "six hundred sixty-five billion, six hundred twenty-nine million, six thousand, seven hundred three".