16640101 has 4 divisors (see below), whose sum is σ = 16667104. Its totient is φ = 16613100.

The previous prime is 16640083. The next prime is 16640119. The reversal of 16640101 is 10104661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10104661 = 7 ⋅1443523.

It is an interprime number because it is at equal distance from previous prime (16640083) and next prime (16640119).

It is a cyclic number.

It is not a de Polignac number, because 16640101 - 2⁵ = 16640069 is a prime.

It is a super-2 number, since 2×16640101² = 553785922580402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16640191) 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, 12555 + ... + 13816.

It is an arithmetic number, because the mean of its divisors is an integer number (4166776).

Almost surely, 2^16640101 is an apocalyptic number.

It is an amenable number.

16640101 is a deficient number, since it is larger than the sum of its proper divisors (27003).

16640101 is an equidigital number, since it uses as much as digits as its factorization.

16640101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27002.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 16640101 is about 4079.2279906865. The cubic root of 16640101 is about 255.3006884862.

Adding to 16640101 its reverse (10104661), we get a palindrome (26744762).

The spelling of 16640101 in words is "sixteen million, six hundred forty thousand, one hundred one".