13668345 has 20 divisors (see below), whose sum is σ = 24502500. Its totient is φ = 7289568.

The previous prime is 13668341. The next prime is 13668349. The reversal of 13668345 is 54386631.

It is an interprime number because it is at equal distance from previous prime (13668341) and next prime (13668349).

It can be written as a sum of positive squares in 2 ways, for example, as 9308601 + 4359744 = 3051^2 + 2088^2 .

It is not a de Polignac number, because 13668345 - 2² = 13668341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13668341) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16470 + ... + 17279.

It is an arithmetic number, because the mean of its divisors is an integer number (1225125).

Almost surely, 2^13668345 is an apocalyptic number.

13668345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13668345 is a deficient number, since it is larger than the sum of its proper divisors (10834155).

13668345 is an equidigital number, since it uses as much as digits as its factorization.

13668345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33766 (or 33757 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 13668345 is about 3697.0724904984. The cubic root of 13668345 is about 239.0958165793.

The spelling of 13668345 in words is "thirteen million, six hundred sixty-eight thousand, three hundred forty-five".