66441069 has 12 divisors (see below), whose sum is σ = 96475392. Its totient is φ = 44061000.

The previous prime is 66441061. The next prime is 66441071. The reversal of 66441069 is 96014466.

66441069 is a `hidden beast` number, since 6 + 644 + 1 + 0 + 6 + 9 = 666.

It is not a de Polignac number, because 66441069 - 2³ = 66441061 is a prime.

It is a super-2 number, since 2×66441069² = 8828831299725522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66441061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17607 + ... + 21044.

It is an arithmetic number, because the mean of its divisors is an integer number (8039616).

Almost surely, 2^66441069 is an apocalyptic number.

It is an amenable number.

66441069 is a deficient number, since it is larger than the sum of its proper divisors (30034323).

66441069 is a wasteful number, since it uses less digits than its factorization.

66441069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38848 (or 38845 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 66441069 is about 8151.1391228466. The cubic root of 66441069 is about 405.0222392909.

The spelling of 66441069 in words is "sixty-six million, four hundred forty-one thousand, sixty-nine".