66130442 has 16 divisors (see below), whose sum is σ = 120035520. Its totient is φ = 26674368.

The previous prime is 66130423. The next prime is 66130447. The reversal of 66130442 is 24403166.

It is not an unprimeable number, because it can be changed into a prime (66130447) 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 7 ways as a sum of consecutive naturals, for example, 138692 + ... + 139167.

It is an arithmetic number, because the mean of its divisors is an integer number (7502220).

Almost surely, 2^66130442 is an apocalyptic number.

66130442 is a deficient number, since it is larger than the sum of its proper divisors (53905078).

66130442 is a wasteful number, since it uses less digits than its factorization.

66130442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277885.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 66130442 is about 8132.0625919873. The cubic root of 66130442 is about 404.3900629349.

The spelling of 66130442 in words is "sixty-six million, one hundred thirty thousand, four hundred forty-two".