66345131 has 8 divisors (see below), whose sum is σ = 70131600. Its totient is φ = 62588160.

The previous prime is 66345121. The next prime is 66345143. The reversal of 66345131 is 13154366.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66345131 - 2¹⁰ = 66344107 is a prime.

It is a super-2 number, since 2×66345131² = 8803352814814322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66345094 and 66345103.

It is not an unprimeable number, because it can be changed into a prime (66345121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2666 + ... + 11823.

It is an arithmetic number, because the mean of its divisors is an integer number (8766450).

Almost surely, 2^66345131 is an apocalyptic number.

66345131 is a deficient number, since it is larger than the sum of its proper divisors (3786469).

66345131 is a wasteful number, since it uses less digits than its factorization.

66345131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14749.

The product of its digits is 6480, while the sum is 29.

The square root of 66345131 is about 8145.2520525764. The cubic root of 66345131 is about 404.8272005806.

Adding to 66345131 its reverse (13154366), we get a palindrome (79499497).

The spelling of 66345131 in words is "sixty-six million, three hundred forty-five thousand, one hundred thirty-one".