66330418 has 48 divisors (see below), whose sum is σ = 129752064. Its totient is φ = 25129440.

The previous prime is 66330371. The next prime is 66330431. The reversal of 66330418 is 81403366.

It is a self number, because there is not a number n which added to its sum of digits gives 66330418.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39055 + ... + 40717.

It is an arithmetic number, because the mean of its divisors is an integer number (2703168).

Almost surely, 2^66330418 is an apocalyptic number.

66330418 is a deficient number, since it is larger than the sum of its proper divisors (63421646).

66330418 is a wasteful number, since it uses less digits than its factorization.

66330418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727 (or 1720 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 66330418 is about 8144.3488383050. The cubic root of 66330418 is about 404.7972729237.

The spelling of 66330418 in words is "sixty-six million, three hundred thirty thousand, four hundred eighteen".