16684566690 has 32 divisors (see below), whose sum is σ = 43683230016. Its totient is φ = 4044743360.

The previous prime is 16684566641. The next prime is 16684566709. The reversal of 16684566690 is 9666548661.

It is a happy number.

It is a super-2 number, since 2×16684566690² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16684566690.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25279317 + ... + 25279976.

It is an arithmetic number, because the mean of its divisors is an integer number (1365100938).

Almost surely, 2^16684566690 is an apocalyptic number.

16684566690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16684566690 is an abundant number, since it is smaller than the sum of its proper divisors (26998663326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16684566690 is a wasteful number, since it uses less digits than its factorization.

16684566690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50559314.

The product of its (nonzero) digits is 11197440, while the sum is 57.

The spelling of 16684566690 in words is "sixteen billion, six hundred eighty-four million, five hundred sixty-six thousand, six hundred ninety".