66110423540431 has 8 divisors (see below), whose sum is σ = 66135724200000. Its totient is φ = 66085123674240.

The previous prime is 66110423540353. The next prime is 66110423540531. The reversal of 66110423540431 is 13404532401166.

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 66110423540431 - 2²¹ = 66110421443279 is a prime.

It is a super-2 number, since 2×66110423540431² (a number of 28 digits) 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 (66110423540531) 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, 207924666 + ... + 208242376.

It is an arithmetic number, because the mean of its divisors is an integer number (8266965525000).

Almost surely, 2^{66110423540431} is an apocalyptic number.

66110423540431 is a deficient number, since it is larger than the sum of its proper divisors (25300659569).

66110423540431 is a wasteful number, since it uses less digits than its factorization.

66110423540431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396689.

The product of its (nonzero) digits is 207360, while the sum is 40.

Adding to 66110423540431 its reverse (13404532401166), we get a palindrome (79514955941597).

The spelling of 66110423540431 in words is "sixty-six trillion, one hundred ten billion, four hundred twenty-three million, five hundred forty thousand, four hundred thirty-one".