66252224 has 14 divisors (see below), whose sum is σ = 131469384. Its totient is φ = 33126080.

The previous prime is 66252209. The next prime is 66252227. The reversal of 66252224 is 42225266.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66252227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 517532 + ... + 517659.

Almost surely, 2^66252224 is an apocalyptic number.

66252224 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66252224 is a deficient number, since it is larger than the sum of its proper divisors (65217160).

66252224 is a wasteful number, since it uses less digits than its factorization.

66252224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035203 (or 1035193 counting only the distinct ones).

The product of its digits is 11520, while the sum is 29.

The square root of 66252224 is about 8139.5469161373. The cubic root of 66252224 is about 404.6381445024.

The spelling of 66252224 in words is "sixty-six million, two hundred fifty-two thousand, two hundred twenty-four".