16620575 has 12 divisors (see below), whose sum is σ = 21090168. Its totient is φ = 12986400.

The previous prime is 16620553. The next prime is 16620587. The reversal of 16620575 is 57502661.

It is a happy number.

It is not a de Polignac number, because 16620575 - 2¹⁴ = 16604191 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 11 ways as a sum of consecutive naturals, for example, 6656 + ... + 8805.

It is an arithmetic number, because the mean of its divisors is an integer number (1757514).

Almost surely, 2^16620575 is an apocalyptic number.

16620575 is a deficient number, since it is larger than the sum of its proper divisors (4469593).

16620575 is a wasteful number, since it uses less digits than its factorization.

16620575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15514 (or 15509 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 16620575 is about 4076.8339431475. The cubic root of 16620575 is about 255.2007902070.

The spelling of 16620575 in words is "sixteen million, six hundred twenty thousand, five hundred seventy-five".