65778224 has 10 divisors (see below), whose sum is σ = 127445340. Its totient is φ = 32889104.

The previous prime is 65778217. The next prime is 65778259. The reversal of 65778224 is 42287756.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2055554 + ... + 2055585.

It is an arithmetic number, because the mean of its divisors is an integer number (12744534).

Almost surely, 2^65778224 is an apocalyptic number.

It is an amenable number.

65778224 is a deficient number, since it is larger than the sum of its proper divisors (61667116).

65778224 is a wasteful number, since it uses less digits than its factorization.

65778224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4111147 (or 4111141 counting only the distinct ones).

The product of its digits is 188160, while the sum is 41.

The square root of 65778224 is about 8110.3775497815. The cubic root of 65778224 is about 403.6708425685.

The spelling of 65778224 in words is "sixty-five million, seven hundred seventy-eight thousand, two hundred twenty-four".