66673734040 has 16 divisors (see below), whose sum is σ = 150015901680. Its totient is φ = 26669493600.

The previous prime is 66673734011. The next prime is 66673734041. The reversal of 66673734040 is 4043737666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66673734041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833421636 + ... + 833421715.

It is an arithmetic number, because the mean of its divisors is an integer number (9375993855).

Almost surely, 2^66673734040 is an apocalyptic number.

It is an amenable number.

66673734040 is an abundant number, since it is smaller than the sum of its proper divisors (83342167640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66673734040 is a wasteful number, since it uses less digits than its factorization.

66673734040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666843362 (or 1666843358 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 46.

The spelling of 66673734040 in words is "sixty-six billion, six hundred seventy-three million, seven hundred thirty-four thousand, forty".