66226442 has 4 divisors (see below), whose sum is σ = 99339666. Its totient is φ = 33113220.

The previous prime is 66226427. The next prime is 66226463. The reversal of 66226442 is 24462266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24462266 = 2 ⋅12231133.

It can be written as a sum of positive squares in only one way, i.e., 48594841 + 17631601 = 6971^2 + 4199^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66226399 and 66226408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16556609 + ... + 16556612.

Almost surely, 2^66226442 is an apocalyptic number.

66226442 is a deficient number, since it is larger than the sum of its proper divisors (33113224).

66226442 is a wasteful number, since it uses less digits than its factorization.

66226442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33113223.

The product of its digits is 27648, while the sum is 32.

The square root of 66226442 is about 8137.9630129413. The cubic root of 66226442 is about 404.5856494889.

The spelling of 66226442 in words is "sixty-six million, two hundred twenty-six thousand, four hundred forty-two".