66875799 has 8 divisors (see below), whose sum is σ = 89289472. Its totient is φ = 44523000.

The previous prime is 66875779. The next prime is 66875843. The reversal of 66875799 is 99757866.

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

It is not a de Polignac number, because 66875799 - 2⁹ = 66875287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66875779) 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, 12589 + ... + 17094.

It is an arithmetic number, because the mean of its divisors is an integer number (11161184).

Almost surely, 2^66875799 is an apocalyptic number.

66875799 is a deficient number, since it is larger than the sum of its proper divisors (22413673).

66875799 is a wasteful number, since it uses less digits than its factorization.

66875799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30437.

The product of its digits is 5715360, while the sum is 57.

The square root of 66875799 is about 8177.7624690376. The cubic root of 66875799 is about 405.9036854856.

It can be divided in two parts, 668 and 75799, that added together give a palindrome (76467).

The spelling of 66875799 in words is "sixty-six million, eight hundred seventy-five thousand, seven hundred ninety-nine".