66626799 has 8 divisors (see below), whose sum is σ = 89484720. Its totient is φ = 44093376.

The previous prime is 66626789. The next prime is 66626801. The reversal of 66626799 is 99762666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66626799 - 2²⁰ = 65578223 is a prime.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66626759) 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 7 ways as a sum of consecutive naturals, for example, 80644 + ... + 81465.

It is an arithmetic number, because the mean of its divisors is an integer number (11185590).

Almost surely, 2^66626799 is an apocalyptic number.

66626799 is a deficient number, since it is larger than the sum of its proper divisors (22857921).

66626799 is a wasteful number, since it uses less digits than its factorization.

66626799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162249.

The product of its digits is 1469664, while the sum is 51.

The square root of 66626799 is about 8162.5240581575. The cubic root of 66626799 is about 405.3992891869.

The spelling of 66626799 in words is "sixty-six million, six hundred twenty-six thousand, seven hundred ninety-nine".