66727799 has 8 divisors (see below), whose sum is σ = 67541760. Its totient is φ = 65919096.

The previous prime is 66727789. The next prime is 66727813. The reversal of 66727799 is 99772766.

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 66727799 - 2⁴ = 66727783 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66727799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66727709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28034 + ... + 30320.

It is an arithmetic number, because the mean of its divisors is an integer number (8442720).

Almost surely, 2^66727799 is an apocalyptic number.

66727799 is a deficient number, since it is larger than the sum of its proper divisors (813961).

66727799 is a wasteful number, since it uses less digits than its factorization.

66727799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2629.

The product of its digits is 2000376, while the sum is 53.

The square root of 66727799 is about 8168.7085270562. The cubic root of 66727799 is about 405.6040349072.

The spelling of 66727799 in words is "sixty-six million, seven hundred twenty-seven thousand, seven hundred ninety-nine".