66478500473 has 64 divisors (see below), whose sum is σ = 86309024256. Its totient is φ = 49704192000.

The previous prime is 66478500461. The next prime is 66478500499. The reversal of 66478500473 is 37400587466.

It is a cyclic number.

It is not a de Polignac number, because 66478500473 - 2⁴ = 66478500457 is a prime.

It is a super-2 number, since 2×66478500473² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66478502473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 70646183 + ... + 70647123.

It is an arithmetic number, because the mean of its divisors is an integer number (1348578504).

Almost surely, 2^66478500473 is an apocalyptic number.

It is an amenable number.

66478500473 is a deficient number, since it is larger than the sum of its proper divisors (19830523783).

66478500473 is a wasteful number, since it uses less digits than its factorization.

66478500473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314.

The product of its (nonzero) digits is 3386880, while the sum is 50.

The spelling of 66478500473 in words is "sixty-six billion, four hundred seventy-eight million, five hundred thousand, four hundred seventy-three".