80606646 has 48 divisors (see below), whose sum is σ = 180969984. Its totient is φ = 25909632.

The previous prime is 80606641. The next prime is 80606663. The reversal of 80606646 is 64660608.

80606646 is a `hidden beast` number, since 8 + 0 + 6 + 0 + 6 + 646 = 666.

It is a super-5 number, since 5×80606646⁵ (a number of 41 digits) contains 55555 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 80606646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80606641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84106 + ... + 85058.

It is an arithmetic number, because the mean of its divisors is an integer number (3770208).

Almost surely, 2^80606646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80606646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90484992).

80606646 is an abundant number, since it is smaller than the sum of its proper divisors (100363338).

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

80606646 is a wasteful number, since it uses less digits than its factorization.

80606646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125 (or 1122 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 80606646 is about 8978.1204046281. The cubic root of 80606646 is about 431.9733458349.

It can be divided in two parts, 8060 and 6646, that added together give a triangular number (14706 = T₁₇₁).

The spelling of 80606646 in words is "eighty million, six hundred six thousand, six hundred forty-six".