80165662720 has 416 divisors, whose sum is σ = 233560664064. Its totient is φ = 26011238400.

The previous prime is 80165662693. The next prime is 80165662729. The reversal of 80165662720 is 2726656108.

It is a tau number, because it is divible by the number of its divisors (416).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80165662729) 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, 90787399 + ... + 90788281.

It is an arithmetic number, because the mean of its divisors is an integer number (561443904).

Almost surely, 2^80165662720 is an apocalyptic number.

80165662720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80165662720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116780332032).

80165662720 is an abundant number, since it is smaller than the sum of its proper divisors (153395001344).

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

80165662720 is a wasteful number, since it uses less digits than its factorization.

80165662720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967 (or 945 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 80165662720 in words is "eighty billion, one hundred sixty-five million, six hundred sixty-two thousand, seven hundred twenty".