125666011 has 8 divisors (see below), whose sum is σ = 127462400. Its totient is φ = 123874920.

The previous prime is 125666003. The next prime is 125666017. The reversal of 125666011 is 110666521.

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

It is a cyclic number.

It is not a de Polignac number, because 125666011 - 2³ = 125666003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125666017) 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, 81316 + ... + 82846.

It is an arithmetic number, because the mean of its divisors is an integer number (15932800).

Almost surely, 2^125666011 is an apocalyptic number.

125666011 is a deficient number, since it is larger than the sum of its proper divisors (1796389).

125666011 is a wasteful number, since it uses less digits than its factorization.

125666011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2649.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 125666011 is about 11210.0852360720. The cubic root of 125666011 is about 500.8864421785.

The spelling of 125666011 in words is "one hundred twenty-five million, six hundred sixty-six thousand, eleven".