66298191 has 16 divisors (see below), whose sum is σ = 91521024. Its totient is φ = 42656544.

The previous prime is 66298187. The next prime is 66298207. The reversal of 66298191 is 19189266.

It is not a de Polignac number, because 66298191 - 2² = 66298187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66298151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11746 + ... + 16448.

It is an arithmetic number, because the mean of its divisors is an integer number (5720064).

Almost surely, 2^66298191 is an apocalyptic number.

66298191 is a deficient number, since it is larger than the sum of its proper divisors (25222833).

66298191 is a wasteful number, since it uses less digits than its factorization.

66298191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4870.

The product of its digits is 46656, while the sum is 42.

The square root of 66298191 is about 8142.3701094951. The cubic root of 66298191 is about 404.7317046399.

The spelling of 66298191 in words is "sixty-six million, two hundred ninety-eight thousand, one hundred ninety-one".