669470947 has 8 divisors (see below), whose sum is σ = 727439360. Its totient is φ = 613775880.

The previous prime is 669470941. The next prime is 669470953. The reversal of 669470947 is 749074966.

It is an interprime number because it is at equal distance from previous prime (669470941) and next prime (669470953).

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 669470947 - 2⁷ = 669470819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 669470894 and 669470903.

It is not an unprimeable number, because it can be changed into a prime (669470941) 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, 567723 + ... + 568900.

It is an arithmetic number, because the mean of its divisors is an integer number (90929920).

Almost surely, 2^669470947 is an apocalyptic number.

669470947 is a deficient number, since it is larger than the sum of its proper divisors (57968413).

669470947 is a wasteful number, since it uses less digits than its factorization.

669470947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136673.

The product of its (nonzero) digits is 2286144, while the sum is 52.

The square root of 669470947 is about 25874.1366426012. The cubic root of 669470947 is about 874.8036335404.

The spelling of 669470947 in words is "six hundred sixty-nine million, four hundred seventy thousand, nine hundred forty-seven".