66044471 has 4 divisors (see below), whose sum is σ = 66082944. Its totient is φ = 66006000.

The previous prime is 66044467. The next prime is 66044479. The reversal of 66044471 is 17444066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17444066 = 2 ⋅8722033.

It is a cyclic number.

It is not a de Polignac number, because 66044471 - 2² = 66044467 is a prime.

It is a super-3 number, since 3×66044471³ (a number of 24 digits) contains 333 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 (66044479) 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, 16535 + ... + 20136.

It is an arithmetic number, because the mean of its divisors is an integer number (16520736).

Almost surely, 2^66044471 is an apocalyptic number.

66044471 is a deficient number, since it is larger than the sum of its proper divisors (38473).

66044471 is a wasteful number, since it uses less digits than its factorization.

66044471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38472.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 66044471 is about 8126.7749445890. The cubic root of 66044471 is about 404.2147483426.

The spelling of 66044471 in words is "sixty-six million, forty-four thousand, four hundred seventy-one".