66298943 has 4 divisors (see below), whose sum is σ = 66613368. Its totient is φ = 65984520.

The previous prime is 66298913. The next prime is 66298951. The reversal of 66298943 is 34989266.

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 66298943 - 2⁶ = 66298879 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 (66298913) 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 3 ways as a sum of consecutive naturals, for example, 156896 + ... + 157317.

It is an arithmetic number, because the mean of its divisors is an integer number (16653342).

Almost surely, 2^66298943 is an apocalyptic number.

66298943 is a deficient number, since it is larger than the sum of its proper divisors (314425).

66298943 is a wasteful number, since it uses less digits than its factorization.

66298943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314424.

The product of its digits is 559872, while the sum is 47.

The square root of 66298943 is about 8142.4162875648. The cubic root of 66298943 is about 404.7332348833.

The spelling of 66298943 in words is "sixty-six million, two hundred ninety-eight thousand, nine hundred forty-three".