66870151 has 4 divisors (see below), whose sum is σ = 67559632. Its totient is φ = 66180672.

The previous prime is 66870149. The next prime is 66870161. The reversal of 66870151 is 15107866.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66870151 - 2¹ = 66870149 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 (66870121) 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 3 ways as a sum of consecutive naturals, for example, 344595 + ... + 344788.

It is an arithmetic number, because the mean of its divisors is an integer number (16889908).

Almost surely, 2^66870151 is an apocalyptic number.

66870151 is a deficient number, since it is larger than the sum of its proper divisors (689481).

66870151 is an equidigital number, since it uses as much as digits as its factorization.

66870151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689480.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 66870151 is about 8177.4171350127. The cubic root of 66870151 is about 405.8922582898.

The spelling of 66870151 in words is "sixty-six million, eight hundred seventy thousand, one hundred fifty-one".