125302021666 has 8 divisors (see below), whose sum is σ = 187954592364. Its totient is φ = 62650490880.

The previous prime is 125302021639. The next prime is 125302021709. The reversal of 125302021666 is 666120203521.

It can be written as a sum of positive squares in 2 ways, for example, as 125298300625 + 3721041 = 353975^2 + 1929^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 214306 + ... + 544546.

Almost surely, 2^125302021666 is an apocalyptic number.

125302021666 is a deficient number, since it is larger than the sum of its proper divisors (62652570698).

125302021666 is a wasteful number, since it uses less digits than its factorization.

125302021666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519956.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 125302021666 in words is "one hundred twenty-five billion, three hundred two million, twenty-one thousand, six hundred sixty-six".