1666476 has 72 divisors (see below), whose sum is σ = 5110560. Its totient is φ = 446976.

The previous prime is 1666447. The next prime is 1666477. The reversal of 1666476 is 6746661.

1666476 = 36² + 37² + ... + 171².

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1666476.

It is not an unprimeable number, because it can be changed into a prime (1666477) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4090 + ... + 4478.

It is an arithmetic number, because the mean of its divisors is an integer number (70980).

2^1666476 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666476, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2555280).

1666476 is an abundant number, since it is smaller than the sum of its proper divisors (3444084).

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

1666476 is a wasteful number, since it uses less digits than its factorization.

1666476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423 (or 418 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 1666476 is about 1290.9206017413. The cubic root of 1666476 is about 118.5585887706.

The spelling of 1666476 in words is "one million, six hundred sixty-six thousand, four hundred seventy-six".