16640011 has 4 divisors (see below), whose sum is σ = 17027032. Its totient is φ = 16252992.

The previous prime is 16640003. The next prime is 16640023. The reversal of 16640011 is 11004661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11004661 = 17 ⋅647333.

It is a cyclic number.

It is not a de Polignac number, because 16640011 - 2³ = 16640003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16640051) 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, 193446 + ... + 193531.

It is an arithmetic number, because the mean of its divisors is an integer number (4256758).

Almost surely, 2^16640011 is an apocalyptic number.

16640011 is a deficient number, since it is larger than the sum of its proper divisors (387021).

16640011 is an equidigital number, since it uses as much as digits as its factorization.

16640011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387020.

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

The square root of 16640011 is about 4079.2169591724. The cubic root of 16640011 is about 255.3002282104.

Adding to 16640011 its reverse (11004661), we get a palindrome (27644672).

The spelling of 16640011 in words is "sixteen million, six hundred forty thousand, eleven".