66382412752640 has 72 divisors (see below), whose sum is σ = 159034098346368. Its totient is φ = 26548376924160.

The previous prime is 66382412752589. The next prime is 66382412752657. The reversal of 66382412752640 is 4625721428366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2934734 + ... + 11890226.

Almost surely, 2^{66382412752640} is an apocalyptic number.

It is an amenable number.

66382412752640 is an abundant number, since it is smaller than the sum of its proper divisors (92651685593728).

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

66382412752640 is an equidigital number, since it uses as much as digits as its factorization.

66382412752640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8961305 (or 8961291 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 56.

The spelling of 66382412752640 in words is "sixty-six trillion, three hundred eighty-two billion, four hundred twelve million, seven hundred fifty-two thousand, six hundred forty".