16610401 has 4 divisors (see below), whose sum is σ = 16762900. Its totient is φ = 16457904.

The previous prime is 16610383. The next prime is 16610413. The reversal of 16610401 is 10401661.

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: 10401661 = 103 ⋅100987.

It can be written as a sum of positive squares in 2 ways, for example, as 14814801 + 1795600 = 3849^2 + 1340^2 .

It is a cyclic number.

It is not a de Polignac number, because 16610401 - 2⁵ = 16610369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16610471) 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, 76086 + ... + 76303.

It is an arithmetic number, because the mean of its divisors is an integer number (4190725).

Almost surely, 2^16610401 is an apocalyptic number.

It is an amenable number.

16610401 is a deficient number, since it is larger than the sum of its proper divisors (152499).

16610401 is a wasteful number, since it uses less digits than its factorization.

16610401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152498.

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

The square root of 16610401 is about 4075.5859701398. The cubic root of 16610401 is about 255.1487073157.

The spelling of 16610401 in words is "sixteen million, six hundred ten thousand, four hundred one".