16766037221 has 8 divisors (see below), whose sum is σ = 16789168704. Its totient is φ = 16742924640.

The previous prime is 16766037181. The next prime is 16766037229. The reversal of 16766037221 is 12273066761.

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

It is a cyclic number.

It is not a de Polignac number, because 16766037221 - 2¹⁰ = 16766036197 is a prime.

It is a super-2 number, since 2×16766037221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16766037229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2736041 + ... + 2742161.

It is an arithmetic number, because the mean of its divisors is an integer number (2098646088).

Almost surely, 2^16766037221 is an apocalyptic number.

It is an amenable number.

16766037221 is a deficient number, since it is larger than the sum of its proper divisors (23131483).

16766037221 is a wasteful number, since it uses less digits than its factorization.

16766037221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9451.

The product of its (nonzero) digits is 127008, while the sum is 41.

The spelling of 16766037221 in words is "sixteen billion, seven hundred sixty-six million, thirty-seven thousand, two hundred twenty-one".