16660206225 has 96 divisors (see below), whose sum is σ = 33281480960. Its totient is φ = 8121876480.

The previous prime is 16660206169. The next prime is 16660206253. The reversal of 16660206225 is 52260206661.

It is not a de Polignac number, because 16660206225 - 2⁷ = 16660206097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16660206225.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 894609 + ... + 913041.

Almost surely, 2^16660206225 is an apocalyptic number.

16660206225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16660206225 is a deficient number, since it is larger than the sum of its proper divisors (16621274735).

16660206225 is a wasteful number, since it uses less digits than its factorization.

16660206225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18568 (or 18557 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 16660206225 in words is "sixteen billion, six hundred sixty million, two hundred six thousand, two hundred twenty-five".