13666345 has 36 divisors (see below), whose sum is σ = 21014532. Its totient is φ = 8500800.

The previous prime is 13666321. The next prime is 13666369. The reversal of 13666345 is 54366631.

It is an interprime number because it is at equal distance from previous prime (13666321) and next prime (13666369).

It can be written as a sum of positive squares in 2 ways, for example, as 4648336 + 9018009 = 2156^2 + 3003^2 .

It is not a de Polignac number, because 13666345 - 2¹⁹ = 13142057 is a prime.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 13666345.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 29415 + ... + 29875.

It is an arithmetic number, because the mean of its divisors is an integer number (583737).

Almost surely, 2^13666345 is an apocalyptic number.

It is an amenable number.

13666345 is a deficient number, since it is larger than the sum of its proper divisors (7348187).

13666345 is a wasteful number, since it uses less digits than its factorization.

13666345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502 (or 484 counting only the distinct ones).

The product of its digits is 38880, while the sum is 34.

The square root of 13666345 is about 3696.8019963206. The cubic root of 13666345 is about 239.0841542320.

The spelling of 13666345 in words is "thirteen million, six hundred sixty-six thousand, three hundred forty-five".