66594349 has 4 divisors (see below), whose sum is σ = 66682620. Its totient is φ = 66506080.

The previous prime is 66594331. The next prime is 66594377. The reversal of 66594349 is 94349566.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30052324 + 36542025 = 5482^2 + 6045^2 .

It is a cyclic number.

It is not a de Polignac number, because 66594349 - 2⁵ = 66594317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66594299 and 66594308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66594329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42994 + ... + 44515.

It is an arithmetic number, because the mean of its divisors is an integer number (16670655).

Almost surely, 2^66594349 is an apocalyptic number.

It is an amenable number.

66594349 is a deficient number, since it is larger than the sum of its proper divisors (88271).

66594349 is an equidigital number, since it uses as much as digits as its factorization.

66594349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88270.

The product of its digits is 699840, while the sum is 46.

The square root of 66594349 is about 8160.5360730776. The cubic root of 66594349 is about 405.3334631058. Note that the first 3 decimals are identical.

The spelling of 66594349 in words is "sixty-six million, five hundred ninety-four thousand, three hundred forty-nine".