1666488 has 32 divisors (see below), whose sum is σ = 4348800. Its totient is φ = 531168.

The previous prime is 1666487. The next prime is 1666499. The reversal of 1666488 is 8846661.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666481) 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, 958 + ... + 2061.

It is an arithmetic number, because the mean of its divisors is an integer number (135900).

2^1666488 is an apocalyptic number.

It is an amenable number.

1666488 is an abundant number, since it is smaller than the sum of its proper divisors (2682312).

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

1666488 is a wasteful number, since it uses less digits than its factorization.

1666488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3051 (or 3047 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 1666488 is about 1290.9252495788. The cubic root of 1666488 is about 118.5588733431.

The spelling of 1666488 in words is "one million, six hundred sixty-six thousand, four hundred eighty-eight".