80656650 has 72 divisors (see below), whose sum is σ = 218316384. Its totient is φ = 21348000.

The previous prime is 80656613. The next prime is 80656651. The reversal of 80656650 is 5665608.

It is not an unprimeable number, because it can be changed into a prime (80656651) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 67357 + ... + 68543.

It is an arithmetic number, because the mean of its divisors is an integer number (3032172).

Almost surely, 2^80656650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80656650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109158192).

80656650 is an abundant number, since it is smaller than the sum of its proper divisors (137659734).

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

80656650 is a wasteful number, since it uses less digits than its factorization.

80656650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356 (or 1348 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 80656650 is about 8980.9047428419. The cubic root of 80656650 is about 432.0626516644.

The spelling of 80656650 in words is "eighty million, six hundred fifty-six thousand, six hundred fifty".