16620055 has 8 divisors (see below), whose sum is σ = 20142144. Its totient is φ = 13164000.

The previous prime is 16620049. The next prime is 16620119. The reversal of 16620055 is 55002661.

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

It is not a de Polignac number, because 16620055 - 2²¹ = 14522903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15951 + ... + 16960.

It is an arithmetic number, because the mean of its divisors is an integer number (2517768).

Almost surely, 2^16620055 is an apocalyptic number.

16620055 is a deficient number, since it is larger than the sum of its proper divisors (3522089).

16620055 is a wasteful number, since it uses less digits than its factorization.

16620055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33017.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 16620055 is about 4076.7701676695. The cubic root of 16620055 is about 255.1981287308.

The spelling of 16620055 in words is "sixteen million, six hundred twenty thousand, fifty-five".