125666660140 has 96 divisors (see below), whose sum is σ = 311464992384. Its totient is φ = 41689313280.

The previous prime is 125666660107. The next prime is 125666660149. The reversal of 125666660140 is 41066666521.

It is not an unprimeable number, because it can be changed into a prime (125666660149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 870564 + ... + 1004596.

It is an arithmetic number, because the mean of its divisors is an integer number (3244427004).

Almost surely, 2^125666660140 is an apocalyptic number.

125666660140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125666660140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155732496192).

125666660140 is an abundant number, since it is smaller than the sum of its proper divisors (185798332244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125666660140 is a wasteful number, since it uses less digits than its factorization.

125666660140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134267 (or 134265 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 125666660140 in words is "one hundred twenty-five billion, six hundred sixty-six million, six hundred sixty thousand, one hundred forty".