66740736 has 40 divisors (see below), whose sum is σ = 177805584. Its totient is φ = 22246400.

The previous prime is 66740719. The next prime is 66740747. The reversal of 66740736 is 63704766.

It is a junction number, because it is equal to n+sod(n) for n = 66740694 and 66740703.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20190 + ... + 23261.

Almost surely, 2^66740736 is an apocalyptic number.

It is an amenable number.

66740736 is an abundant number, since it is smaller than the sum of its proper divisors (111064848).

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

66740736 is an equidigital number, since it uses as much as digits as its factorization.

66740736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43472 (or 43456 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 39.

The square root of 66740736 is about 8169.5003519187. The cubic root of 66740736 is about 405.6302456739.

It can be divided in two parts, 66740 and 736, that added together give a palindrome (67476).

The spelling of 66740736 in words is "sixty-six million, seven hundred forty thousand, seven hundred thirty-six".