66630306 has 32 divisors (see below), whose sum is σ = 137763648. Its totient is φ = 21470400.

The previous prime is 66630271. The next prime is 66630307. The reversal of 66630306 is 60303666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66630307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24780 + ... + 27336.

It is an arithmetic number, because the mean of its divisors is an integer number (4305114).

Almost surely, 2^66630306 is an apocalyptic number.

66630306 is an abundant number, since it is smaller than the sum of its proper divisors (71133342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66630306 is a wasteful number, since it uses less digits than its factorization.

66630306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2706.

The product of its (nonzero) digits is 11664, while the sum is 30.

The square root of 66630306 is about 8162.7388785873. The cubic root of 66630306 is about 405.4064019923.

The spelling of 66630306 in words is "sixty-six million, six hundred thirty thousand, three hundred six".