10191666 has 8 divisors (see below), whose sum is σ = 20383344. Its totient is φ = 3397220.

The previous prime is 10191659. The next prime is 10191703. The reversal of 10191666 is 66619101.

It is a happy number.

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

10191666 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 849300 + ... + 849311.

It is an arithmetic number, because the mean of its divisors is an integer number (2547918).

Almost surely, 2^10191666 is an apocalyptic number.

10191666 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.

10191666 is a wasteful number, since it uses less digits than its factorization.

10191666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698616.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 10191666 is about 3192.4388796029. The cubic root of 10191666 is about 216.8112071702.

The spelling of 10191666 in words is "ten million, one hundred ninety-one thousand, six hundred sixty-six".