66223436 has 24 divisors (see below), whose sum is σ = 122262000. Its totient is φ = 31299264.

The previous prime is 66223427. The next prime is 66223441. The reversal of 66223436 is 63432266.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53270 + ... + 54498.

It is an arithmetic number, because the mean of its divisors is an integer number (5094250).

Almost surely, 2^66223436 is an apocalyptic number.

It is an amenable number.

66223436 is a deficient number, since it is larger than the sum of its proper divisors (56038564).

66223436 is a wasteful number, since it uses less digits than its factorization.

66223436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1961 (or 1959 counting only the distinct ones).

The product of its digits is 31104, while the sum is 32.

The square root of 66223436 is about 8137.7783208932. The cubic root of 66223436 is about 404.5795280524.

The spelling of 66223436 in words is "sixty-six million, two hundred twenty-three thousand, four hundred thirty-six".