66429727 has 32 divisors (see below), whose sum is σ = 90381312. Its totient is φ = 47291904.

The previous prime is 66429721. The next prime is 66429731. The reversal of 66429727 is 72792466.

It is a cyclic number.

It is not a de Polignac number, because 66429727 - 2¹¹ = 66427679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66429721) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 34648 + ... + 36514.

It is an arithmetic number, because the mean of its divisors is an integer number (2824416).

Almost surely, 2^66429727 is an apocalyptic number.

66429727 is a deficient number, since it is larger than the sum of its proper divisors (23951585).

66429727 is a wasteful number, since it uses less digits than its factorization.

66429727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927.

The product of its digits is 254016, while the sum is 43.

The square root of 66429727 is about 8150.4433621736. The cubic root of 66429727 is about 404.9991911786. Note that the first 3 decimals are identical.

The spelling of 66429727 in words is "sixty-six million, four hundred twenty-nine thousand, seven hundred twenty-seven".