125666388 has 36 divisors (see below), whose sum is σ = 331470048. Its totient is φ = 40067280.

The previous prime is 125666383. The next prime is 125666389. The reversal of 125666388 is 883666521.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125666381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75058 + ... + 76713.

Almost surely, 2^125666388 is an apocalyptic number.

125666388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

125666388 is an abundant number, since it is smaller than the sum of its proper divisors (205803660).

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

125666388 is a wasteful number, since it uses less digits than its factorization.

125666388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151804 (or 151799 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 125666388 is about 11210.1020512750. The cubic root of 125666388 is about 500.8869430670.

The spelling of 125666388 in words is "one hundred twenty-five million, six hundred sixty-six thousand, three hundred eighty-eight".