79766 has 4 divisors (see below), whose sum is σ = 119652. Its totient is φ = 39882.

The previous prime is 79757. The next prime is 79769. The reversal of 79766 is 66797.

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

It is a super-2 number, since 2×79766² = 12725229512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19940 + ... + 19943.

It is an arithmetic number, because the mean of its divisors is an integer number (29913).

2⁷⁹⁷⁶⁶ is an apocalyptic number.

79766 is a deficient number, since it is larger than the sum of its proper divisors (39886).

79766 is a wasteful number, since it uses less digits than its factorization.

79766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39885.

The product of its digits is 15876, while the sum is 35.

The square root of 79766 is about 282.4287520774. The cubic root of 79766 is about 43.0466412963.

The spelling of 79766 in words is "seventy-nine thousand, seven hundred sixty-six".