66384097 has 4 divisors (see below), whose sum is σ = 71490580. Its totient is φ = 61277616.

The previous prime is 66384091. The next prime is 66384127. The reversal of 66384097 is 79048366.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79048366 = 2 ⋅39524183.

It can be written as a sum of positive squares in 2 ways, for example, as 3721041 + 62663056 = 1929^2 + 7916^2 .

It is a cyclic number.

It is not a de Polignac number, because 66384097 - 2¹¹ = 66382049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66384091) 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, 2553222 + ... + 2553247.

It is an arithmetic number, because the mean of its divisors is an integer number (17872645).

Almost surely, 2^66384097 is an apocalyptic number.

It is an amenable number.

66384097 is a deficient number, since it is larger than the sum of its proper divisors (5106483).

66384097 is a wasteful number, since it uses less digits than its factorization.

66384097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5106482.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 66384097 is about 8147.6436470921. The cubic root of 66384097 is about 404.9064398015.

The spelling of 66384097 in words is "sixty-six million, three hundred eighty-four thousand, ninety-seven".