1666360 has 16 divisors (see below), whose sum is σ = 3749400. Its totient is φ = 666528.

The previous prime is 1666351. The next prime is 1666361. The reversal of 1666360 is 636661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20790 + ... + 20869.

2^1666360 is an apocalyptic number.

1666360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1666360 is an abundant number, since it is smaller than the sum of its proper divisors (2083040).

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

1666360 is a wasteful number, since it uses less digits than its factorization.

1666360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41670 (or 41666 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 1666360 is about 1290.8756717825. The cubic root of 1666360 is about 118.5558378329. Note that the first 3 decimals are identical.

The spelling of 1666360 in words is "one million, six hundred sixty-six thousand, three hundred sixty".