669796571 has 8 divisors (see below), whose sum is σ = 696048000. Its totient is φ = 643835520.

The previous prime is 669796559. The next prime is 669796573. The reversal of 669796571 is 175697966.

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 669796571 - 2²⁶ = 602687707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669796573) 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 7 ways as a sum of consecutive naturals, for example, 67886 + ... + 77123.

It is an arithmetic number, because the mean of its divisors is an integer number (87006000).

Almost surely, 2^669796571 is an apocalyptic number.

669796571 is a deficient number, since it is larger than the sum of its proper divisors (26251429).

669796571 is a wasteful number, since it uses less digits than its factorization.

669796571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145189.

The product of its digits is 4286520, while the sum is 56.

The square root of 669796571 is about 25880.4283388046. The cubic root of 669796571 is about 874.9454424759.

The spelling of 669796571 in words is "six hundred sixty-nine million, seven hundred ninety-six thousand, five hundred seventy-one".