66243051 has 18 divisors (see below), whose sum is σ = 111307092. Its totient is φ = 37852920.

The previous prime is 66243049. The next prime is 66243053. The reversal of 66243051 is 15034266.

66243051 is a `hidden beast` number, since 6 + 624 + 30 + 5 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (66243049) and next prime (66243053).

It is not a de Polignac number, because 66243051 - 2¹ = 66243049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66243053) 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 17 ways as a sum of consecutive naturals, for example, 74665 + ... + 75546.

Almost surely, 2^66243051 is an apocalyptic number.

66243051 is a deficient number, since it is larger than the sum of its proper divisors (45064041).

66243051 is a wasteful number, since it uses less digits than its factorization.

66243051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150231 (or 150221 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 66243051 is about 8138.9834131788. The cubic root of 66243051 is about 404.6194688173.

The spelling of 66243051 in words is "sixty-six million, two hundred forty-three thousand, fifty-one".