66654141040 has 80 divisors (see below), whose sum is σ = 155943768960. Its totient is φ = 26494801920.

The previous prime is 66654141023. The next prime is 66654141041. The reversal of 66654141040 is 4014145666.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66654141041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8863362 + ... + 8870878.

It is an arithmetic number, because the mean of its divisors is an integer number (1949297112).

Almost surely, 2^66654141040 is an apocalyptic number.

It is an amenable number.

66654141040 is an abundant number, since it is smaller than the sum of its proper divisors (89289627920).

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

66654141040 is a wasteful number, since it uses less digits than its factorization.

66654141040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8210 (or 8204 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 66654141040 in words is "sixty-six billion, six hundred fifty-four million, one hundred forty-one thousand, forty".