669795943 has 4 divisors (see below), whose sum is σ = 676427688. Its totient is φ = 663164200.

The previous prime is 669795913. The next prime is 669795947. The reversal of 669795943 is 349597966.

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 669795943 - 2⁵ = 669795911 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 (669795947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3315721 + ... + 3315922.

It is an arithmetic number, because the mean of its divisors is an integer number (169106922).

Almost surely, 2^669795943 is an apocalyptic number.

669795943 is a deficient number, since it is larger than the sum of its proper divisors (6631745).

669795943 is a wasteful number, since it uses less digits than its factorization.

669795943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6631744.

The product of its digits is 11022480, while the sum is 58.

The square root of 669795943 is about 25880.4162060814. The cubic root of 669795943 is about 874.9451690267.

The spelling of 669795943 in words is "six hundred sixty-nine million, seven hundred ninety-five thousand, nine hundred forty-three".