669171385397 has 8 divisors (see below), whose sum is σ = 683502648192. Its totient is φ = 654844021600.

The previous prime is 669171385387. The next prime is 669171385433. The reversal of 669171385397 is 793583171966.

669171385397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 669171385397 - 2¹⁰ = 669171384373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669171385387) 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, 626504 + ... + 1315617.

It is an arithmetic number, because the mean of its divisors is an integer number (85437831024).

Almost surely, 2^669171385397 is an apocalyptic number.

It is an amenable number.

669171385397 is a deficient number, since it is larger than the sum of its proper divisors (14331262795).

669171385397 is a wasteful number, since it uses less digits than its factorization.

669171385397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949499.

The product of its digits is 51438240, while the sum is 65.

The spelling of 669171385397 in words is "six hundred sixty-nine billion, one hundred seventy-one million, three hundred eighty-five thousand, three hundred ninety-seven".