1666536 has 16 divisors (see below), whose sum is σ = 4166400. Its totient is φ = 555504.

The previous prime is 1666531. The next prime is 1666541. The reversal of 1666536 is 6356661.

It is an interprime number because it is at equal distance from previous prime (1666531) and next prime (1666541).

It is a junction number, because it is equal to n+sod(n) for n = 1666497 and 1666506.

It is not an unprimeable number, because it can be changed into a prime (1666531) 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, 34696 + ... + 34743.

It is an arithmetic number, because the mean of its divisors is an integer number (260400).

2^1666536 is an apocalyptic number.

It is an amenable number.

1666536 is an abundant number, since it is smaller than the sum of its proper divisors (2499864).

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

1666536 is a wasteful number, since it uses less digits than its factorization.

1666536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69448 (or 69444 counting only the distinct ones).

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

The square root of 1666536 is about 1290.9438407615. The cubic root of 1666536 is about 118.5600116194.

The spelling of 1666536 in words is "one million, six hundred sixty-six thousand, five hundred thirty-six".