669840703 has 4 divisors (see below), whose sum is σ = 765532240. Its totient is φ = 574149168.

The previous prime is 669840701. The next prime is 669840719. The reversal of 669840703 is 307048966.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 669840703 - 2¹ = 669840701 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 669840703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669840701) 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, 47845758 + ... + 47845771.

It is an arithmetic number, because the mean of its divisors is an integer number (191383060).

Almost surely, 2^669840703 is an apocalyptic number.

669840703 is a deficient number, since it is larger than the sum of its proper divisors (95691537).

669840703 is an equidigital number, since it uses as much as digits as its factorization.

669840703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95691536.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 669840703 is about 25881.2809381607. The cubic root of 669840703 is about 874.9646583821.

It can be divided in two parts, 66 and 9840703, that added together give a square (9840769 = 3137²).

The spelling of 669840703 in words is "six hundred sixty-nine million, eight hundred forty thousand, seven hundred three".