67440406473 has 24 divisors (see below), whose sum is σ = 109697792256. Its totient is φ = 39554488800.

The previous prime is 67440406469. The next prime is 67440406499. The reversal of 67440406473 is 37460404476.

It is not a de Polignac number, because 67440406473 - 2² = 67440406469 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67440406433) 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 23 ways as a sum of consecutive naturals, for example, 10984290 + ... + 10990427.

It is an arithmetic number, because the mean of its divisors is an integer number (4570741344).

Almost surely, 2^67440406473 is an apocalyptic number.

It is an amenable number.

67440406473 is a deficient number, since it is larger than the sum of its proper divisors (42257385783).

67440406473 is a wasteful number, since it uses less digits than its factorization.

67440406473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21974765 (or 21974762 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 45.

The spelling of 67440406473 in words is "sixty-seven billion, four hundred forty million, four hundred six thousand, four hundred seventy-three".