80665914672 has 480 divisors, whose sum is σ = 273623201280. Its totient is φ = 21703127040.

The previous prime is 80665914661. The next prime is 80665914673. The reversal of 80665914672 is 27641956608.

80665914672 is a `hidden beast` number, since 8 + 0 + 6 + 6 + 591 + 46 + 7 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (80665914673) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 287067172 + ... + 287067452.

It is an arithmetic number, because the mean of its divisors is an integer number (570048336).

Almost surely, 2^80665914672 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 80665914672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136811600640).

80665914672 is an abundant number, since it is smaller than the sum of its proper divisors (192957286608).

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

80665914672 is a wasteful number, since it uses less digits than its factorization.

80665914672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561 (or 552 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 80665914672 in words is "eighty billion, six hundred sixty-five million, nine hundred fourteen thousand, six hundred seventy-two".