66199530 has 32 divisors (see below), whose sum is σ = 168225984. Its totient is φ = 16614656.

The previous prime is 66199519. The next prime is 66199559. The reversal of 66199530 is 3599166.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64392 + ... + 65411.

It is an arithmetic number, because the mean of its divisors is an integer number (5257062).

Almost surely, 2^66199530 is an apocalyptic number.

66199530 is an abundant number, since it is smaller than the sum of its proper divisors (102026454).

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

66199530 is a wasteful number, since it uses less digits than its factorization.

66199530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129830.

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 66199530 is about 8136.3093599002. The cubic root of 66199530 is about 404.5308391349.

The spelling of 66199530 in words is "sixty-six million, one hundred ninety-nine thousand, five hundred thirty".