16620271 has 8 divisors (see below), whose sum is σ = 17781120. Its totient is φ = 15479808.

The previous prime is 16620239. The next prime is 16620301. The reversal of 16620271 is 17202661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16620271 - 2⁵ = 16620239 is a prime.

It is a super-2 number, since 2×16620271² = 552466816226882, 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 (16620671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3391 + ... + 6688.

It is an arithmetic number, because the mean of its divisors is an integer number (2222640).

Almost surely, 2^16620271 is an apocalyptic number.

16620271 is a deficient number, since it is larger than the sum of its proper divisors (1160849).

16620271 is a wasteful number, since it uses less digits than its factorization.

16620271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10193.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 16620271 is about 4076.7966591431. The cubic root of 16620271 is about 255.1992342738.

The spelling of 16620271 in words is "sixteen million, six hundred twenty thousand, two hundred seventy-one".