66727333940 has 24 divisors (see below), whose sum is σ = 141367471560. Its totient is φ = 26454729728.

The previous prime is 66727333931. The next prime is 66727333943. The reversal of 66727333940 is 4933372766.

It can be written as a sum of positive squares in 4 ways, for example, as 1204645264 + 65522688676 = 34708^2 + 255974^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66727333943) 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, 14760425 + ... + 14764944.

It is an arithmetic number, because the mean of its divisors is an integer number (5890311315).

Almost surely, 2^66727333940 is an apocalyptic number.

It is an amenable number.

66727333940 is an abundant number, since it is smaller than the sum of its proper divisors (74640137620).

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

66727333940 is a wasteful number, since it uses less digits than its factorization.

66727333940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29525491 (or 29525489 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 50.

The spelling of 66727333940 in words is "sixty-six billion, seven hundred twenty-seven million, three hundred thirty-three thousand, nine hundred forty".