66104493 has 64 divisors (see below), whose sum is σ = 114573312. Its totient is φ = 32970240.

The previous prime is 66104471. The next prime is 66104501. The reversal of 66104493 is 39440166.

It is not a de Polignac number, because 66104493 - 2⁶ = 66104429 is a prime.

It is a super-3 number, since 3×66104493³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66104453) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 617746 + ... + 617852.

It is an arithmetic number, because the mean of its divisors is an integer number (1790208).

Almost surely, 2^66104493 is an apocalyptic number.

It is an amenable number.

66104493 is a deficient number, since it is larger than the sum of its proper divisors (48468819).

66104493 is a wasteful number, since it uses less digits than its factorization.

66104493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 66104493 is about 8130.4669607594. The cubic root of 66104493 is about 404.3371629882.

The spelling of 66104493 in words is "sixty-six million, one hundred four thousand, four hundred ninety-three".