65001666 has 8 divisors (see below), whose sum is σ = 130003344. Its totient is φ = 21667220.

The previous prime is 65001619. The next prime is 65001689. The reversal of 65001666 is 66610056.

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

65001666 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5416800 + ... + 5416811.

It is an arithmetic number, because the mean of its divisors is an integer number (16250418).

Almost surely, 2^65001666 is an apocalyptic number.

65001666 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.

65001666 is a wasteful number, since it uses less digits than its factorization.

65001666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10833616.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 65001666 is about 8062.3610685704. The cubic root of 65001666 is about 402.0760109727.

The spelling of 65001666 in words is "sixty-five million, one thousand, six hundred sixty-six".