66351242 has 4 divisors (see below), whose sum is σ = 99526866. Its totient is φ = 33175620.

The previous prime is 66351203. The next prime is 66351247. The reversal of 66351242 is 24215366.

66351242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 61293241 + 5058001 = 7829^2 + 2249^2 .

It is not an unprimeable number, because it can be changed into a prime (66351247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16587809 + ... + 16587812.

Almost surely, 2^66351242 is an apocalyptic number.

66351242 is a deficient number, since it is larger than the sum of its proper divisors (33175624).

66351242 is a wasteful number, since it uses less digits than its factorization.

66351242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33175623.

The product of its digits is 8640, while the sum is 29.

The square root of 66351242 is about 8145.6271704516. The cubic root of 66351242 is about 404.8396296417.

The spelling of 66351242 in words is "sixty-six million, three hundred fifty-one thousand, two hundred forty-two".