16666666425 has 36 divisors (see below), whose sum is σ = 30066669360. Its totient is φ = 8824923360.

The previous prime is 16666666421. The next prime is 16666666439. The reversal of 16666666425 is 52466666661.

It is not a de Polignac number, because 16666666425 - 2² = 16666666421 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16666666421) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 235179 + ... + 297728.

It is an arithmetic number, because the mean of its divisors is an integer number (835185260).

Almost surely, 2^16666666425 is an apocalyptic number.

16666666425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16666666425 is a deficient number, since it is larger than the sum of its proper divisors (13400002935).

16666666425 is a wasteful number, since it uses less digits than its factorization.

16666666425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533062 (or 533054 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 54.

The spelling of 16666666425 in words is "sixteen billion, six hundred sixty-six million, six hundred sixty-six thousand, four hundred twenty-five".