66732273793 has 8 divisors (see below), whose sum is σ = 67279065480. Its totient is φ = 66186347520.

The previous prime is 66732273791. The next prime is 66732273799. The reversal of 66732273793 is 39737223766.

It can be written as a sum of positive squares in 4 ways, for example, as 329168449 + 66403105344 = 18143^2 + 257688^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66732273793 - 2¹ = 66732273791 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 61048 + ... + 370393.

It is an arithmetic number, because the mean of its divisors is an integer number (8409883185).

Almost surely, 2^66732273793 is an apocalyptic number.

It is an amenable number.

66732273793 is a deficient number, since it is larger than the sum of its proper divisors (546791687).

66732273793 is a wasteful number, since it uses less digits than its factorization.

66732273793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432707.

The product of its digits is 12002256, while the sum is 55.

The spelling of 66732273793 in words is "sixty-six billion, seven hundred thirty-two million, two hundred seventy-three thousand, seven hundred ninety-three".