66798339 has 16 divisors (see below), whose sum is σ = 92772000. Its totient is φ = 42699776.

The previous prime is 66798337. The next prime is 66798343. The reversal of 66798339 is 93389766.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 66798339 - 2¹ = 66798337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66798291 and 66798300.

It is not an unprimeable number, because it can be changed into a prime (66798331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10387 + ... + 15539.

It is an arithmetic number, because the mean of its divisors is an integer number (5798250).

Almost surely, 2^66798339 is an apocalyptic number.

66798339 is a deficient number, since it is larger than the sum of its proper divisors (25973661).

66798339 is a wasteful number, since it uses less digits than its factorization.

66798339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5334.

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

The square root of 66798339 is about 8173.0250825505. The cubic root of 66798339 is about 405.7469100557.

The spelling of 66798339 in words is "sixty-six million, seven hundred ninety-eight thousand, three hundred thirty-nine".