16101666 has 48 divisors (see below), whose sum is σ = 41356224. Its totient is φ = 4599504.

The previous prime is 16101661. The next prime is 16101691. The reversal of 16101666 is 66610161.

16101666 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16101661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1036 + ... + 5768.

It is an arithmetic number, because the mean of its divisors is an integer number (861588).

Almost surely, 2^16101666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16101666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20678112).

16101666 is an abundant number, since it is smaller than the sum of its proper divisors (25254558).

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

16101666 is an equidigital number, since it uses as much as digits as its factorization.

16101666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4757 (or 4745 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 16101666 is about 4012.6881264310. The cubic root of 16101666 is about 252.5167965822.

The spelling of 16101666 in words is "sixteen million, one hundred one thousand, six hundred sixty-six".