16632401 has 4 divisors (see below), whose sum is σ = 16787952. Its totient is φ = 16476852.

The previous prime is 16632379. The next prime is 16632403. The reversal of 16632401 is 10423661.

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: 10423661 = 2207 ⋅4723.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16632401 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16632403) 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, 77615 + ... + 77828.

It is an arithmetic number, because the mean of its divisors is an integer number (4196988).

Almost surely, 2^16632401 is an apocalyptic number.

It is an amenable number.

16632401 is a deficient number, since it is larger than the sum of its proper divisors (155551).

16632401 is a wasteful number, since it uses less digits than its factorization.

16632401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155550.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 16632401 is about 4078.2840754415. The cubic root of 16632401 is about 255.2613033366.

The spelling of 16632401 in words is "sixteen million, six hundred thirty-two thousand, four hundred one".