66741231 has 4 divisors (see below), whose sum is σ = 88988312. Its totient is φ = 44494152.

The previous prime is 66741223. The next prime is 66741251. The reversal of 66741231 is 13214766.

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

It is not a de Polignac number, because 66741231 - 2³ = 66741223 is a prime.

It is a super-2 number, since 2×66741231² = 8908783830790722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66741221) 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, 11123536 + ... + 11123541.

It is an arithmetic number, because the mean of its divisors is an integer number (22247078).

Almost surely, 2^66741231 is an apocalyptic number.

66741231 is a deficient number, since it is larger than the sum of its proper divisors (22247081).

66741231 is a wasteful number, since it uses less digits than its factorization.

66741231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22247080.

The product of its digits is 6048, while the sum is 30.

The square root of 66741231 is about 8169.5306474730. The cubic root of 66741231 is about 405.6312484921.

Adding to 66741231 its reverse (13214766), we get a palindrome (79955997).

The spelling of 66741231 in words is "sixty-six million, seven hundred forty-one thousand, two hundred thirty-one".