1666423006 has 32 divisors (see below), whose sum is σ = 2669911200. Its totient is φ = 777807360.

The previous prime is 1666423001. The next prime is 1666423009. The reversal of 1666423006 is 6003246661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666423001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1260826 + ... + 1262146.

It is an arithmetic number, because the mean of its divisors is an integer number (83434725).

Almost surely, 2^1666423006 is an apocalyptic number.

1666423006 is a deficient number, since it is larger than the sum of its proper divisors (1003488194).

1666423006 is a wasteful number, since it uses less digits than its factorization.

1666423006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 1666423006 is about 40821.8447157891. The cubic root of 1666423006 is about 1185.5733203479.

Adding to 1666423006 its reverse (6003246661), we get a palindrome (7669669667).

The spelling of 1666423006 in words is "one billion, six hundred sixty-six million, four hundred twenty-three thousand, six".