66444267 has 16 divisors (see below), whose sum is σ = 91357472. Its totient is φ = 42923520.

The previous prime is 66444227. The next prime is 66444271. The reversal of 66444267 is 76244466.

It is not a de Polignac number, because 66444267 - 2⁸ = 66444011 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66444227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29667 + ... + 31827.

It is an arithmetic number, because the mean of its divisors is an integer number (5709842).

Almost surely, 2^66444267 is an apocalyptic number.

66444267 is a deficient number, since it is larger than the sum of its proper divisors (24913205).

66444267 is a wasteful number, since it uses less digits than its factorization.

66444267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2478.

The product of its digits is 193536, while the sum is 39.

The square root of 66444267 is about 8151.3352893866. The cubic root of 66444267 is about 405.0287374822.

The spelling of 66444267 in words is "sixty-six million, four hundred forty-four thousand, two hundred sixty-seven".