16665912 has 48 divisors (see below), whose sum is σ = 46814040. Its totient is φ = 5554656.

The previous prime is 16665911. The next prime is 16665949. The reversal of 16665912 is 21956661.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16665911) 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, 2343 + ... + 6230.

Almost surely, 2^16665912 is an apocalyptic number.

16665912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16665912 is an abundant number, since it is smaller than the sum of its proper divisors (30148128).

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

16665912 is an equidigital number, since it uses as much as digits as its factorization.

16665912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8594 (or 8578 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 16665912 is about 4082.3904761794. The cubic root of 16665912 is about 255.4326220184.

The spelling of 16665912 in words is "sixteen million, six hundred sixty-five thousand, nine hundred twelve".