66223151 has 8 divisors (see below), whose sum is σ = 70139520. Its totient is φ = 62349912.

The previous prime is 66223133. The next prime is 66223163. The reversal of 66223151 is 15132266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66223151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66223151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66223121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7595 + ... + 13788.

It is an arithmetic number, because the mean of its divisors is an integer number (8767440).

Almost surely, 2^66223151 is an apocalyptic number.

66223151 is a deficient number, since it is larger than the sum of its proper divisors (3916369).

66223151 is a wasteful number, since it uses less digits than its factorization.

66223151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21565.

The product of its digits is 2160, while the sum is 26.

The square root of 66223151 is about 8137.7608099526. The cubic root of 66223151 is about 404.5789476671.

The spelling of 66223151 in words is "sixty-six million, two hundred twenty-three thousand, one hundred fifty-one".