12661920017 has 8 divisors (see below), whose sum is σ = 13344548160. Its totient is φ = 11980913040.

The previous prime is 12661920013. The next prime is 12661920041. The reversal of 12661920017 is 71002916621.

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 12661920017 - 2² = 12661920013 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12661920013) 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, 389234 + ... + 420507.

It is an arithmetic number, because the mean of its divisors is an integer number (1668068520).

Almost surely, 2^12661920017 is an apocalyptic number.

It is an amenable number.

12661920017 is a deficient number, since it is larger than the sum of its proper divisors (682628143).

12661920017 is an equidigital number, since it uses as much as digits as its factorization.

12661920017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810583.

The product of its (nonzero) digits is 9072, while the sum is 35.

The spelling of 12661920017 in words is "twelve billion, six hundred sixty-one million, nine hundred twenty thousand, seventeen".