66141305 has 16 divisors (see below), whose sum is σ = 84324240. Its totient is φ = 49631232.

The previous prime is 66141287. The next prime is 66141319. The reversal of 66141305 is 50314166.

It can be written as a sum of positive squares in 8 ways, for example, as 1290496 + 64850809 = 1136^2 + 8053^2 .

It is a cyclic number.

It is not a de Polignac number, because 66141305 - 2¹⁸ = 65879161 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27491 + ... + 29799.

It is an arithmetic number, because the mean of its divisors is an integer number (5270265).

Almost surely, 2^66141305 is an apocalyptic number.

It is an amenable number.

66141305 is a deficient number, since it is larger than the sum of its proper divisors (18182935).

66141305 is a wasteful number, since it uses less digits than its factorization.

66141305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 66141305 is about 8132.7304762915. The cubic root of 66141305 is about 404.4122042696.

The spelling of 66141305 in words is "sixty-six million, one hundred forty-one thousand, three hundred five".