66406306 has 8 divisors (see below), whose sum is σ = 102039084. Its totient is φ = 32393280.

The previous prime is 66406303. The next prime is 66406331. The reversal of 66406306 is 60360466.

It can be written as a sum of positive squares in 2 ways, for example, as 43758225 + 22648081 = 6615^2 + 4759^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (66406303) 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, 404835 + ... + 404998.

Almost surely, 2^66406306 is an apocalyptic number.

66406306 is a deficient number, since it is larger than the sum of its proper divisors (35632778).

66406306 is a wasteful number, since it uses less digits than its factorization.

66406306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809876.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 66406306 is about 8149.0064425057. The cubic root of 66406306 is about 404.9515889907.

The spelling of 66406306 in words is "sixty-six million, four hundred six thousand, three hundred six".