666514541 has 8 divisors (see below), whose sum is σ = 830979264. Its totient is φ = 519361920.

The previous prime is 666514523. The next prime is 666514543. The reversal of 666514541 is 145415666.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-666514541 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 666514495 and 666514504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666514543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4327940 + ... + 4328093.

It is an arithmetic number, because the mean of its divisors is an integer number (103872408).

Almost surely, 2^666514541 is an apocalyptic number.

It is an amenable number.

666514541 is a deficient number, since it is larger than the sum of its proper divisors (164464723).

666514541 is a wasteful number, since it uses less digits than its factorization.

666514541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8656051.

The product of its digits is 86400, while the sum is 38.

The square root of 666514541 is about 25816.9429057741. The cubic root of 666514541 is about 873.5140126762.

The spelling of 666514541 in words is "six hundred sixty-six million, five hundred fourteen thousand, five hundred forty-one".