66740732 has 12 divisors (see below), whose sum is σ = 116944296.
Its totient is φ = 33328080.
The previous prime is 66740719. The next prime is 66740747. The reversal of 66740732 is 23704766.
It is a junction number, because it is equal to n+sod(n) for n = 66740692 and 66740701.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6878 + ... + 13445.
It is an arithmetic number, because the mean of its divisors is an integer number (9745358).
Almost surely, 266740732 is an apocalyptic number.
It is an amenable number.
66740732 is a deficient number, since it is larger than the sum of its proper divisors (50203564).
66740732 is a wasteful number, since it uses less digits than its factorization.
66740732 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 21148 (or 21146 counting only the distinct ones).
The product of its (nonzero) digits is 42336, while the sum is 35.
The square root of 66740732 is about 8169.5001071057.
The cubic root of 66740732 is about 405.6302375703.
The spelling of 66740732 in words is "sixty-six million, seven hundred forty thousand, seven hundred thirty-two".