16616066550 has 48 divisors (see below), whose sum is σ = 41772363600. Its totient is φ = 4370250240.

The previous prime is 16616066497. The next prime is 16616066567. The reversal of 16616066550 is 5566061661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 747775 + ... + 769674.

It is an arithmetic number, because the mean of its divisors is an integer number (870257575).

Almost surely, 2^16616066550 is an apocalyptic number.

16616066550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16616066550 is an abundant number, since it is smaller than the sum of its proper divisors (25156297050).

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

16616066550 is a wasteful number, since it uses less digits than its factorization.

16616066550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517537 (or 1517532 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 16616066550 in words is "sixteen billion, six hundred sixteen million, sixty-six thousand, five hundred fifty".