16621693066 has 16 divisors (see below), whose sum is σ = 27340069248. Its totient is φ = 7516166400.

The previous prime is 16621693019. The next prime is 16621693079. The reversal of 16621693066 is 66039612661.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1953090 + ... + 1961581.

It is an arithmetic number, because the mean of its divisors is an integer number (1708754328).

Almost surely, 2^16621693066 is an apocalyptic number.

16621693066 is a deficient number, since it is larger than the sum of its proper divisors (10718376182).

16621693066 is a wasteful number, since it uses less digits than its factorization.

16621693066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3914877.

The product of its (nonzero) digits is 419904, while the sum is 46.

The spelling of 16621693066 in words is "sixteen billion, six hundred twenty-one million, six hundred ninety-three thousand, sixty-six".