125403456666 has 8 divisors (see below), whose sum is σ = 250806913344. Its totient is φ = 41801152220.

The previous prime is 125403456649. The next prime is 125403456679. The reversal of 125403456666 is 666654304521.

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

125403456666 is an admirable number.

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, 10450288050 + ... + 10450288061.

It is an arithmetic number, because the mean of its divisors is an integer number (31350864168).

Almost surely, 2^125403456666 is an apocalyptic number.

125403456666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

125403456666 is a wasteful number, since it uses less digits than its factorization.

125403456666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20900576116.

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 125403456666 in words is "one hundred twenty-five billion, four hundred three million, four hundred fifty-six thousand, six hundred sixty-six".