669909572439 has 8 divisors (see below), whose sum is σ = 897701270400. Its totient is φ = 444362128056.

The previous prime is 669909572419. The next prime is 669909572441. The reversal of 669909572439 is 934275909966.

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

It is not a de Polignac number, because 669909572439 - 2¹¹ = 669909570391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669909572419) 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, 561062697 + ... + 561063890.

It is an arithmetic number, because the mean of its divisors is an integer number (112212658800).

Almost surely, 2^669909572439 is an apocalyptic number.

669909572439 is a deficient number, since it is larger than the sum of its proper divisors (227791697961).

669909572439 is a wasteful number, since it uses less digits than its factorization.

669909572439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122126789.

The product of its (nonzero) digits is 198404640, while the sum is 69.

The spelling of 669909572439 in words is "six hundred sixty-nine billion, nine hundred nine million, five hundred seventy-two thousand, four hundred thirty-nine".