1320666 has 16 divisors (see below), whose sum is σ = 2668224. Its totient is φ = 435744.

The previous prime is 1320623. The next prime is 1320667. The reversal of 1320666 is 6660231.

It is not an unprimeable number, because it can be changed into a prime (1320667) 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, 451 + ... + 1686.

It is an arithmetic number, because the mean of its divisors is an integer number (166764).

2^1320666 is an apocalyptic number.

1320666 is an abundant number, since it is smaller than the sum of its proper divisors (1347558).

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

1320666 is a wasteful number, since it uses less digits than its factorization.

1320666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2245.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 1320666 is about 1149.2023320547. The cubic root of 1320666 is about 109.7145768415.

Adding to 1320666 its reverse (6660231), we get a palindrome (7980897).

The spelling of 1320666 in words is "one million, three hundred twenty thousand, six hundred sixty-six".