125666339 has 16 divisors (see below), whose sum is σ = 133132032. Its totient is φ = 118486368.

The previous prime is 125666287. The next prime is 125666341. The reversal of 125666339 is 933666521.

It is a cyclic number.

It is not a de Polignac number, because 125666339 - 2⁸ = 125666083 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125666296 and 125666305.

It is not an unprimeable number, because it can be changed into a prime (125666369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152282 + ... + 153104.

It is an arithmetic number, because the mean of its divisors is an integer number (8320752).

Almost surely, 2^125666339 is an apocalyptic number.

125666339 is a deficient number, since it is larger than the sum of its proper divisors (7465693).

125666339 is an equidigital number, since it uses as much as digits as its factorization.

125666339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986.

The product of its digits is 174960, while the sum is 41.

The square root of 125666339 is about 11210.0998657461. The cubic root of 125666339 is about 500.8868779648.

The spelling of 125666339 in words is "one hundred twenty-five million, six hundred sixty-six thousand, three hundred thirty-nine".