66114481 has 4 divisors (see below), whose sum is σ = 66135412. Its totient is φ = 66093552.

The previous prime is 66114473. The next prime is 66114487. The reversal of 66114481 is 18441166.

It is the 3320-th star number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18441166 = 2 ⋅9220583.

It can be written as a sum of positive squares in 2 ways, for example, as 20430400 + 45684081 = 4520^2 + 6759^2 .

It is a cyclic number.

It is not a de Polignac number, because 66114481 - 2³ = 66114473 is a prime.

It is a super-2 number, since 2×66114481² = 8742249195798722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66114487) 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, 4650 + ... + 12403.

It is an arithmetic number, because the mean of its divisors is an integer number (16533853).

Almost surely, 2^66114481 is an apocalyptic number.

It is an amenable number.

66114481 is a deficient number, since it is larger than the sum of its proper divisors (20931).

66114481 is a wasteful number, since it uses less digits than its factorization.

66114481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20930.

The product of its digits is 4608, while the sum is 31.

The square root of 66114481 is about 8131.0811704225. The cubic root of 66114481 is about 404.3575262849.

The spelling of 66114481 in words is "sixty-six million, one hundred fourteen thousand, four hundred eighty-one".