66306049 has 4 divisors (see below), whose sum is σ = 67716864. Its totient is φ = 64895236.

The previous prime is 66306047. The next prime is 66306083. The reversal of 66306049 is 94060366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66306049 - 2¹ = 66306047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66306047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 705337 + ... + 705430.

It is an arithmetic number, because the mean of its divisors is an integer number (16929216).

It is a Proth number, since it is equal to 4047 ⋅ 2¹⁴ + 1 and 4047 < 2¹⁴.

Almost surely, 2^66306049 is an apocalyptic number.

It is an amenable number.

66306049 is a deficient number, since it is larger than the sum of its proper divisors (1410815).

66306049 is a wasteful number, since it uses less digits than its factorization.

66306049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410814.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 66306049 is about 8142.8526328308. The cubic root of 66306049 is about 404.7476942974.

The spelling of 66306049 in words is "sixty-six million, three hundred six thousand, forty-nine".