666141541 has 4 divisors (see below), whose sum is σ = 717383212. Its totient is φ = 614899872.

The previous prime is 666141529. The next prime is 666141551. The reversal of 666141541 is 145141666.

666141541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 131560900 + 534580641 = 11470^2 + 23121^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666141541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 666141497 and 666141506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666141521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25620816 + ... + 25620841.

It is an arithmetic number, because the mean of its divisors is an integer number (179345803).

Almost surely, 2^666141541 is an apocalyptic number.

It is an amenable number.

666141541 is a deficient number, since it is larger than the sum of its proper divisors (51241671).

666141541 is a wasteful number, since it uses less digits than its factorization.

666141541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51241670.

The product of its digits is 17280, while the sum is 34.

The square root of 666141541 is about 25809.7179566147. The cubic root of 666141541 is about 873.3510347240.

The spelling of 666141541 in words is "six hundred sixty-six million, one hundred forty-one thousand, five hundred forty-one".