66484799 has 4 divisors (see below), whose sum is σ = 67611720. Its totient is φ = 65357880.

The previous prime is 66484729. The next prime is 66484811. The reversal of 66484799 is 99748466.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66484799 - 2¹² = 66480703 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 66484799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66484729) 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 3 ways as a sum of consecutive naturals, for example, 563372 + ... + 563489.

It is an arithmetic number, because the mean of its divisors is an integer number (16902930).

Almost surely, 2^66484799 is an apocalyptic number.

66484799 is a deficient number, since it is larger than the sum of its proper divisors (1126921).

66484799 is a wasteful number, since it uses less digits than its factorization.

66484799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126920.

The product of its digits is 2612736, while the sum is 53.

The square root of 66484799 is about 8153.8211287715. The cubic root of 66484799 is about 405.1110786108. Note that the first 3 decimals are identical.

The spelling of 66484799 in words is "sixty-six million, four hundred eighty-four thousand, seven hundred ninety-nine".