16251666 has 8 divisors (see below), whose sum is σ = 32503344. Its totient is φ = 5417220.

The previous prime is 16251661. The next prime is 16251679. The reversal of 16251666 is 66615261.

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

16251666 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16251661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1354300 + ... + 1354311.

It is an arithmetic number, because the mean of its divisors is an integer number (4062918).

Almost surely, 2^16251666 is an apocalyptic number.

16251666 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.

16251666 is a wasteful number, since it uses less digits than its factorization.

16251666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2708616.

The product of its digits is 12960, while the sum is 33.

The square root of 16251666 is about 4031.3355107210. The cubic root of 16251666 is about 253.2985066775.

The spelling of 16251666 in words is "sixteen million, two hundred fifty-one thousand, six hundred sixty-six".