66228964 has 24 divisors (see below), whose sum is σ = 120827840. Its totient is φ = 31733856.

The previous prime is 66228947. The next prime is 66229039. The reversal of 66228964 is 46982266.

It is a self number, because there is not a number n which added to its sum of digits gives 66228964.

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, 6577 + ... + 13255.

Almost surely, 2^66228964 is an apocalyptic number.

It is an amenable number.

66228964 is a deficient number, since it is larger than the sum of its proper divisors (54598876).

66228964 is a wasteful number, since it uses less digits than its factorization.

66228964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6787 (or 6785 counting only the distinct ones).

The product of its digits is 248832, while the sum is 43.

The square root of 66228964 is about 8138.1179642470. The cubic root of 66228964 is about 404.5907851619.

The spelling of 66228964 in words is "sixty-six million, two hundred twenty-eight thousand, nine hundred sixty-four".