16606540646 has 8 divisors (see below), whose sum is σ = 24911289480. Its totient is φ = 8302777488.

The previous prime is 16606540637. The next prime is 16606540723. The reversal of 16606540646 is 64604560661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 16606540597 and 16606540606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202751 + ... + 272618.

It is an arithmetic number, because the mean of its divisors is an integer number (3113911185).

Almost surely, 2^16606540646 is an apocalyptic number.

16606540646 is a deficient number, since it is larger than the sum of its proper divisors (8304748834).

16606540646 is a wasteful number, since it uses less digits than its factorization.

16606540646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492838.

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 16606540646 in words is "sixteen billion, six hundred six million, five hundred forty thousand, six hundred forty-six".