21160766 has 8 divisors (see below), whose sum is σ = 34626744. Its totient is φ = 9618520.

The previous prime is 21160747. The next prime is 21160771. The reversal of 21160766 is 66706112.

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

It is a pancake number, because a pancake can be divided into 21160766 parts by 6505 straight cuts.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480905 + ... + 480948.

It is an arithmetic number, because the mean of its divisors is an integer number (4328343).

Almost surely, 2^21160766 is an apocalyptic number.

21160766 is a deficient number, since it is larger than the sum of its proper divisors (13465978).

21160766 is a wasteful number, since it uses less digits than its factorization.

21160766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961866.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 21160766 is about 4600.0832601161. The cubic root of 21160766 is about 276.5946623155.

Adding to 21160766 its reverse (66706112), we get a palindrome (87866878).

The spelling of 21160766 in words is "twenty-one million, one hundred sixty thousand, seven hundred sixty-six".