16652501 has 4 divisors (see below), whose sum is σ = 16660812. Its totient is φ = 16644192.

The previous prime is 16652491. The next prime is 16652507. The reversal of 16652501 is 10525661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10525661 = 397 ⋅26513.

It can be written as a sum of positive squares in 2 ways, for example, as 13140625 + 3511876 = 3625^2 + 1874^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16652501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16652507) 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, 905 + ... + 5841.

It is an arithmetic number, because the mean of its divisors is an integer number (4165203).

Almost surely, 2^16652501 is an apocalyptic number.

It is an amenable number.

16652501 is a deficient number, since it is larger than the sum of its proper divisors (8311).

16652501 is an equidigital number, since it uses as much as digits as its factorization.

16652501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8310.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 16652501 is about 4080.7476030747. The cubic root of 16652501 is about 255.3640883920.

The spelling of 16652501 in words is "sixteen million, six hundred fifty-two thousand, five hundred one".