16665650 has 24 divisors (see below), whose sum is σ = 31220100. Its totient is φ = 6618560.

The previous prime is 16665643. The next prime is 16665673. The reversal of 16665650 is 5656661.

It can be written as a sum of positive squares in 6 ways, for example, as 5058001 + 11607649 = 2249^2 + 3407^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 16665650.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6332 + ... + 8568.

Almost surely, 2^16665650 is an apocalyptic number.

16665650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16665650 is a deficient number, since it is larger than the sum of its proper divisors (14554450).

16665650 is a wasteful number, since it uses less digits than its factorization.

16665650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2398 (or 2393 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 16665650 is about 4082.3583870111. The cubic root of 16665650 is about 255.4312834839.

The spelling of 16665650 in words is "sixteen million, six hundred sixty-five thousand, six hundred fifty".