669713242469 has 4 divisors (see below), whose sum is σ = 669726062796. Its totient is φ = 669700422144.

The previous prime is 669713242463. The next prime is 669713242487. The reversal of 669713242469 is 964242317966.

669713242469 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 517913394244 + 151799848225 = 719662^2 + 389615^2 .

It is a cyclic number.

It is not a de Polignac number, because 669713242469 - 2⁴ = 669713242453 is a prime.

It is a super-2 number, since 2×669713242469² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669713242463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6331484 + ... + 6436389.

It is an arithmetic number, because the mean of its divisors is an integer number (167431515699).

Almost surely, 2^669713242469 is an apocalyptic number.

It is an amenable number.

669713242469 is a deficient number, since it is larger than the sum of its proper divisors (12820327).

669713242469 is a wasteful number, since it uses less digits than its factorization.

669713242469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12820326.

The product of its digits is 23514624, while the sum is 59.

The spelling of 669713242469 in words is "six hundred sixty-nine billion, seven hundred thirteen million, two hundred forty-two thousand, four hundred sixty-nine".