1666668333 has 32 divisors (see below), whose sum is σ = 2447470080. Its totient is φ = 1000475840.

The previous prime is 1666668323. The next prime is 1666668359. The reversal of 1666668333 is 3338666661.

It is a cyclic number.

It is not a de Polignac number, because 1666668333 - 2¹⁶ = 1666602797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666668323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2528758 + ... + 2529416.

It is an arithmetic number, because the mean of its divisors is an integer number (76483440).

Almost surely, 2^1666668333 is an apocalyptic number.

It is an amenable number.

1666668333 is a deficient number, since it is larger than the sum of its proper divisors (780801747).

1666668333 is a wasteful number, since it uses less digits than its factorization.

1666668333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289.

The product of its digits is 1679616, while the sum is 48.

The square root of 1666668333 is about 40824.8494547132. The cubic root of 1666668333 is about 1185.6314966279.

The spelling of 1666668333 in words is "one billion, six hundred sixty-six million, six hundred sixty-eight thousand, three hundred thirty-three".