1666433 has 8 divisors (see below), whose sum is σ = 1766400. Its totient is φ = 1567728.

The previous prime is 1666429. The next prime is 1666447. The reversal of 1666433 is 3346661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1666433 - 2² = 1666429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1666396 and 1666405.

It is not an unprimeable number, because it can be changed into a prime (1666403) 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, 4160 + ... + 4542.

It is an arithmetic number, because the mean of its divisors is an integer number (220800).

2^1666433 is an apocalyptic number.

It is an amenable number.

1666433 is a deficient number, since it is larger than the sum of its proper divisors (99967).

1666433 is a wasteful number, since it uses less digits than its factorization.

1666433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631.

The product of its digits is 7776, while the sum is 29.

The square root of 1666433 is about 1290.9039468527. The cubic root of 1666433 is about 118.5575690414.

The spelling of 1666433 in words is "one million, six hundred sixty-six thousand, four hundred thirty-three".