66318842 has 4 divisors (see below), whose sum is σ = 99478266. Its totient is φ = 33159420.

The previous prime is 66318839. The next prime is 66318871. The reversal of 66318842 is 24881366.

It is a happy number.

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., 49434961 + 16883881 = 7031^2 + 4109^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66318796 and 66318805.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16579709 + ... + 16579712.

Almost surely, 2^66318842 is an apocalyptic number.

66318842 is a deficient number, since it is larger than the sum of its proper divisors (33159424).

66318842 is a wasteful number, since it uses less digits than its factorization.

66318842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33159423.

The product of its digits is 55296, while the sum is 38.

The square root of 66318842 is about 8143.6381304672. The cubic root of 66318842 is about 404.7737231156.

The spelling of 66318842 in words is "sixty-six million, three hundred eighteen thousand, eight hundred forty-two".