66270451558272 has 256 divisors, whose sum is σ = 196163674560000. Its totient is φ = 19682252513280.

The previous prime is 66270451558217. The next prime is 66270451558309. The reversal of 66270451558272 is 27285515407266.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 531380979 + ... + 531505677.

It is an arithmetic number, because the mean of its divisors is an integer number (766264353750).

Almost surely, 2^{66270451558272} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66270451558272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98081837280000).

66270451558272 is an abundant number, since it is smaller than the sum of its proper divisors (129893223001728).

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

66270451558272 is a wasteful number, since it uses less digits than its factorization.

66270451558272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128429 (or 128417 counting only the distinct ones).

The product of its (nonzero) digits is 56448000, while the sum is 60.

The spelling of 66270451558272 in words is "sixty-six trillion, two hundred seventy billion, four hundred fifty-one million, five hundred fifty-eight thousand, two hundred seventy-two".