66476493 has 12 divisors (see below), whose sum is σ = 99119488. Its totient is φ = 42887880.

The previous prime is 66476491. The next prime is 66476507. The reversal of 66476493 is 39467466.

It is not a de Polignac number, because 66476493 - 2¹ = 66476491 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66476491) 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 11 ways as a sum of consecutive naturals, for example, 118855 + ... + 119412.

Almost surely, 2^66476493 is an apocalyptic number.

It is an amenable number.

66476493 is a deficient number, since it is larger than the sum of its proper divisors (32642995).

66476493 is a wasteful number, since it uses less digits than its factorization.

66476493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238304 (or 238301 counting only the distinct ones).

The product of its digits is 653184, while the sum is 45.

The square root of 66476493 is about 8153.3117811108. The cubic root of 66476493 is about 405.0942076227.

The spelling of 66476493 in words is "sixty-six million, four hundred seventy-six thousand, four hundred ninety-three".