66151 has 4 divisors (see below), whose sum is σ = 67032. Its totient is φ = 65272.

The previous prime is 66137. The next prime is 66161. The reversal of 66151 is 15166.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15166 = 2 ⋅7583.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66151 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316 + ... + 481.

It is an arithmetic number, because the mean of its divisors is an integer number (16758).

2⁶⁶¹⁵¹ is an apocalyptic number.

66151 is a deficient number, since it is larger than the sum of its proper divisors (881).

66151 is an equidigital number, since it uses as much as digits as its factorization.

66151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880.

The product of its digits is 180, while the sum is 19.

The square root of 66151 is about 257.1983670244. The cubic root of 66151 is about 40.4431962900.

The spelling of 66151 in words is "sixty-six thousand, one hundred fifty-one".