669820849727 has 8 divisors (see below), whose sum is σ = 720076166400. Its totient is φ = 621065691864.

The previous prime is 669820849637. The next prime is 669820849759. The reversal of 669820849727 is 727948028966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 669820849727 - 2⁸ = 669820849471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669820849627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375038777 + ... + 375040562.

It is an arithmetic number, because the mean of its divisors is an integer number (90009520800).

Almost surely, 2^669820849727 is an apocalyptic number.

669820849727 is a deficient number, since it is larger than the sum of its proper divisors (50255316673).

669820849727 is a wasteful number, since it uses less digits than its factorization.

669820849727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750079405.

The product of its (nonzero) digits is 146313216, while the sum is 68.

The spelling of 669820849727 in words is "six hundred sixty-nine billion, eight hundred twenty million, eight hundred forty-nine thousand, seven hundred twenty-seven".