66706151 has 4 divisors (see below), whose sum is σ = 66728592. Its totient is φ = 66683712.

The previous prime is 66706127. The next prime is 66706163. The reversal of 66706151 is 15160766.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15160766 = 2 ⋅7580383.

It is a cyclic number.

It is not a de Polignac number, because 66706151 - 2¹⁴ = 66689767 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 (66706111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5930 + ... + 12983.

It is an arithmetic number, because the mean of its divisors is an integer number (16682148).

Almost surely, 2^66706151 is an apocalyptic number.

66706151 is a deficient number, since it is larger than the sum of its proper divisors (22441).

66706151 is a wasteful number, since it uses less digits than its factorization.

66706151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22440.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 66706151 is about 8167.3833631096. The cubic root of 66706151 is about 405.5601678034.

It can be divided in two parts, 6670 and 6151, that added together give a palindrome (12821).

The spelling of 66706151 in words is "sixty-six million, seven hundred six thousand, one hundred fifty-one".