80665503534 has 180 divisors, whose sum is σ = 231115821552. Its totient is φ = 20951829360.

The previous prime is 80665503493. The next prime is 80665503559. The reversal of 80665503534 is 43530556608.

80665503534 is a `hidden beast` number, since 8 + 0 + 6 + 65 + 50 + 3 + 534 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 80665503534.

It is a congruent number.

It is an unprimeable number.

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 89 ways as a sum of consecutive naturals, for example, 918507 + ... + 1002489.

Almost surely, 2^80665503534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80665503534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115557910776).

80665503534 is an abundant number, since it is smaller than the sum of its proper divisors (150450318018).

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

80665503534 is a wasteful number, since it uses less digits than its factorization.

80665503534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84033 (or 84006 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The spelling of 80665503534 in words is "eighty billion, six hundred sixty-five million, five hundred three thousand, five hundred thirty-four".