16611720662 has 4 divisors (see below), whose sum is σ = 24917580996. Its totient is φ = 8305860330.

The previous prime is 16611720659. The next prime is 16611720689. The reversal of 16611720662 is 26602711661.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4152930164 + ... + 4152930167.

It is an arithmetic number, because the mean of its divisors is an integer number (6229395249).

Almost surely, 2^16611720662 is an apocalyptic number.

16611720662 is a deficient number, since it is larger than the sum of its proper divisors (8305860334).

16611720662 is an equidigital number, since it uses as much as digits as its factorization.

16611720662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8305860333.

The product of its (nonzero) digits is 36288, while the sum is 38.

Subtracting 16611720662 from its reverse (26602711661), we obtain a palindrome (9990990999).

The spelling of 16611720662 in words is "sixteen billion, six hundred eleven million, seven hundred twenty thousand, six hundred sixty-two".