66944269 has 4 divisors (see below), whose sum is σ = 76507744. Its totient is φ = 57380796.

The previous prime is 66944261. The next prime is 66944279. The reversal of 66944269 is 96244966.

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.

It is a cyclic number.

It is not a de Polignac number, because 66944269 - 2³ = 66944261 is a prime.

It is a super-2 number, since 2×66944269² = 8963070303888722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66944261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4781727 + ... + 4781740.

It is an arithmetic number, because the mean of its divisors is an integer number (19126936).

Almost surely, 2^66944269 is an apocalyptic number.

It is an amenable number.

66944269 is a deficient number, since it is larger than the sum of its proper divisors (9563475).

66944269 is an equidigital number, since it uses as much as digits as its factorization.

66944269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9563474.

The product of its digits is 559872, while the sum is 46.

The square root of 66944269 is about 8181.9477509943. The cubic root of 66944269 is about 406.0421648072.

The spelling of 66944269 in words is "sixty-six million, nine hundred forty-four thousand, two hundred sixty-nine".