15766 has 4 divisors (see below), whose sum is σ = 23652. Its totient is φ = 7882.

The previous prime is 15761. The next prime is 15767. The reversal of 15766 is 66751.

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

It is an Ulam number.

It is a plaindrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 15766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3940 + ... + 3943.

It is an arithmetic number, because the mean of its divisors is an integer number (5913).

2¹⁵⁷⁶⁶ is an apocalyptic number.

15766 is a deficient number, since it is larger than the sum of its proper divisors (7886).

15766 is an equidigital number, since it uses as much as digits as its factorization.

15766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7885.

The product of its digits is 1260, while the sum is 25.

The square root of 15766 is about 125.5627333248. The cubic root of 15766 is about 25.0749749256.

The spelling of 15766 in words is "fifteen thousand, seven hundred sixty-six".