80665872551 has 8 divisors (see below), whose sum is σ = 90837815808. Its totient is φ = 70967043000.

The previous prime is 80665872509. The next prime is 80665872563. The reversal of 80665872551 is 15527856608.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80665872551 - 2¹⁰ = 80665871527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80665872493 and 80665872502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80665872571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118278065 + ... + 118278746.

It is an arithmetic number, because the mean of its divisors is an integer number (11354726976).

Almost surely, 2^80665872551 is an apocalyptic number.

80665872551 is a deficient number, since it is larger than the sum of its proper divisors (10171943257).

80665872551 is a wasteful number, since it uses less digits than its factorization.

80665872551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236556853.

The product of its (nonzero) digits is 4032000, while the sum is 53.

The spelling of 80665872551 in words is "eighty billion, six hundred sixty-five million, eight hundred seventy-two thousand, five hundred fifty-one".