669781461317 has 8 divisors (see below), whose sum is σ = 677026321920. Its totient is φ = 662548627600.

The previous prime is 669781461281. The next prime is 669781461379. The reversal of 669781461317 is 713164187966.

It is a happy number.

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 669781461317 - 2³⁶ = 601061984581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669781491317) 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, 2894717 + ... + 3117522.

It is an arithmetic number, because the mean of its divisors is an integer number (84628290240).

Almost surely, 2^669781461317 is an apocalyptic number.

It is an amenable number.

669781461317 is a deficient number, since it is larger than the sum of its proper divisors (7244860603).

669781461317 is a wasteful number, since it uses less digits than its factorization.

669781461317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6013443.

The product of its digits is 9144576, while the sum is 59.

The spelling of 669781461317 in words is "six hundred sixty-nine billion, seven hundred eighty-one million, four hundred sixty-one thousand, three hundred seventeen".