66243151 has 8 divisors (see below), whose sum is σ = 74440800. Its totient is φ = 58488672.

The previous prime is 66243137. The next prime is 66243157. The reversal of 66243151 is 15134266.

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

It is a cyclic number.

It is not a de Polignac number, because 66243151 - 2¹¹ = 66241103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66243157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110476 + ... + 111073.

It is an arithmetic number, because the mean of its divisors is an integer number (9305100).

Almost surely, 2^66243151 is an apocalyptic number.

66243151 is a deficient number, since it is larger than the sum of its proper divisors (8197649).

66243151 is a wasteful number, since it uses less digits than its factorization.

66243151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221585.

The product of its digits is 4320, while the sum is 28.

The square root of 66243151 is about 8138.9895564499. The cubic root of 66243151 is about 404.6196724207.

The spelling of 66243151 in words is "sixty-six million, two hundred forty-three thousand, one hundred fifty-one".