66517473 has 16 divisors (see below), whose sum is σ = 97465536. Its totient is φ = 40016640.

The previous prime is 66517439. The next prime is 66517487. The reversal of 66517473 is 37471566.

It is not a de Polignac number, because 66517473 - 2¹⁷ = 66386401 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66517433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2836 + ... + 11877.

It is an arithmetic number, because the mean of its divisors is an integer number (6091596).

Almost surely, 2^66517473 is an apocalyptic number.

It is an amenable number.

66517473 is a deficient number, since it is larger than the sum of its proper divisors (30948063).

66517473 is a wasteful number, since it uses less digits than its factorization.

66517473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14864.

The product of its digits is 105840, while the sum is 39.

The square root of 66517473 is about 8155.8244831531. The cubic root of 66517473 is about 405.1774317812.

The spelling of 66517473 in words is "sixty-six million, five hundred seventeen thousand, four hundred seventy-three".