66664333 has 4 divisors (see below), whose sum is σ = 66709408. Its totient is φ = 66619260.

The previous prime is 66664321. The next prime is 66664349. The reversal of 66664333 is 33346666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33346666 = 2 ⋅16673333.

It is a cyclic number.

It is not a de Polignac number, because 66664333 - 2¹⁷ = 66533261 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66664292 and 66664301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66664133) 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 3 ways as a sum of consecutive naturals, for example, 20241 + ... + 23302.

It is an arithmetic number, because the mean of its divisors is an integer number (16677352).

Almost surely, 2^66664333 is an apocalyptic number.

It is an amenable number.

66664333 is a deficient number, since it is larger than the sum of its proper divisors (45075).

66664333 is a wasteful number, since it uses less digits than its factorization.

66664333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45074.

The product of its digits is 139968, while the sum is 37.

The square root of 66664333 is about 8164.8229007125. The cubic root of 66664333 is about 405.4754017057.

The spelling of 66664333 in words is "sixty-six million, six hundred sixty-four thousand, three hundred thirty-three".