66025843 has 4 divisors (see below), whose sum is σ = 71104768. Its totient is φ = 60946920.

The previous prime is 66025831. The next prime is 66025859. The reversal of 66025843 is 34852066.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66025843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66025799 and 66025808.

It is not an unprimeable number, because it can be changed into a prime (66025823) 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, 2539443 + ... + 2539468.

It is an arithmetic number, because the mean of its divisors is an integer number (17776192).

Almost surely, 2^66025843 is an apocalyptic number.

66025843 is a deficient number, since it is larger than the sum of its proper divisors (5078925).

66025843 is a wasteful number, since it uses less digits than its factorization.

66025843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5078924.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 66025843 is about 8125.6287756702. The cubic root of 66025843 is about 404.1767415256.

The spelling of 66025843 in words is "sixty-six million, twenty-five thousand, eight hundred forty-three".