16806761 has 8 divisors (see below), whose sum is σ = 18230184. Its totient is φ = 15431680.

The previous prime is 16806737. The next prime is 16806763. The reversal of 16806761 is 16760861.

It can be written as a sum of positive squares in 4 ways, for example, as 1907161 + 14899600 = 1381^2 + 3860^2 .

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 16806761 - 2¹⁴ = 16790377 is a prime.

It is a super-2 number, since 2×16806761² = 564934430622242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16806763) 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, 11360 + ... + 12753.

It is an arithmetic number, because the mean of its divisors is an integer number (2278773).

Almost surely, 2^16806761 is an apocalyptic number.

It is an amenable number.

16806761 is a deficient number, since it is larger than the sum of its proper divisors (1423423).

16806761 is a wasteful number, since it uses less digits than its factorization.

16806761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24171.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 16806761 is about 4099.6049809707. The cubic root of 16806761 is about 256.1501855156.

The spelling of 16806761 in words is "sixteen million, eight hundred six thousand, seven hundred sixty-one".