66732273792 has 360 divisors, whose sum is σ = 206824551615. Its totient is φ = 21358536192.

The previous prime is 66732273791. The next prime is 66732273799. The reversal of 66732273792 is 29737223766.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 33366136896 + 33366136896 = 182664^2 + 182664^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=182664.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (66732273791) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 1131055459 + ... + 1131055517.

Almost surely, 2^66732273792 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 66732273792

66732273792 is an abundant number, since it is smaller than the sum of its proper divisors (140092277823).

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

66732273792 is an frugal number, since it uses more digits than its factorization.

66732273792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230 (or 107 counting only the distinct ones).

The product of its digits is 8001504, while the sum is 54.

The spelling of 66732273792 in words is "sixty-six billion, seven hundred thirty-two million, two hundred seventy-three thousand, seven hundred ninety-two".