66431141 has 8 divisors (see below), whose sum is σ = 78539520. Its totient is φ = 54977328.

The previous prime is 66431119. The next prime is 66431143. The reversal of 66431141 is 14113466.

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

It is not a de Polignac number, because 66431141 - 2¹⁴ = 66414757 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66431141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66431143) 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, 163421 + ... + 163826.

It is an arithmetic number, because the mean of its divisors is an integer number (9817440).

Almost surely, 2^66431141 is an apocalyptic number.

It is an amenable number.

66431141 is a deficient number, since it is larger than the sum of its proper divisors (12108379).

66431141 is a wasteful number, since it uses less digits than its factorization.

66431141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327283.

The product of its digits is 1728, while the sum is 26.

The square root of 66431141 is about 8150.5301054594. The cubic root of 66431141 is about 405.0020647154.

The spelling of 66431141 in words is "sixty-six million, four hundred thirty-one thousand, one hundred forty-one".