80726166 has 64 divisors (see below), whose sum is σ = 194088960. Its totient is φ = 24773760.

The previous prime is 80726137. The next prime is 80726167. The reversal of 80726166 is 66162708.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 80726166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80726167) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42211 + ... + 44081.

It is an arithmetic number, because the mean of its divisors is an integer number (3032640).

Almost surely, 2^80726166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80726166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97044480).

80726166 is an abundant number, since it is smaller than the sum of its proper divisors (113362794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80726166 is a wasteful number, since it uses less digits than its factorization.

80726166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946 (or 1940 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 80726166 is about 8984.7741207000. The cubic root of 80726166 is about 432.1867441087.

The spelling of 80726166 in words is "eighty million, seven hundred twenty-six thousand, one hundred sixty-six".