1365666 has 8 divisors (see below), whose sum is σ = 2731344. Its totient is φ = 455220.

The previous prime is 1365659. The next prime is 1365667. The reversal of 1365666 is 6665631.

It is a sphenic number, since it is the product of 3 distinct primes.

1365666 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1365667) 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, 113800 + ... + 113811.

It is an arithmetic number, because the mean of its divisors is an integer number (341418).

2^1365666 is an apocalyptic number.

1365666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1365666 is a wasteful number, since it uses less digits than its factorization.

1365666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227616.

The product of its digits is 19440, while the sum is 33.

The square root of 1365666 is about 1168.6171314849. The cubic root of 1365666 is about 110.9468132497.

The spelling of 1365666 in words is "one million, three hundred sixty-five thousand, six hundred sixty-six".