80664740 has 36 divisors (see below), whose sum is σ = 182754516. Its totient is φ = 29730432.

The previous prime is 80664721. The next prime is 80664751. The reversal of 80664740 is 4746608.

It can be written as a sum of positive squares in 6 ways, for example, as 37552384 + 43112356 = 6128^2 + 6566^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 80664740.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144542 + ... + 145098.

Almost surely, 2^80664740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80664740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91377258).

80664740 is an abundant number, since it is smaller than the sum of its proper divisors (102089776).

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

80664740 is a wasteful number, since it uses less digits than its factorization.

80664740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136 (or 577 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 80664740 is about 8981.3551316046. The cubic root of 80664740 is about 432.0770967225.

The spelling of 80664740 in words is "eighty million, six hundred sixty-four thousand, seven hundred forty".