80669827765 has 8 divisors (see below), whose sum is σ = 97067566080. Its totient is φ = 64360013712.

The previous prime is 80669827687. The next prime is 80669827811. The reversal of 80669827765 is 56772896608.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80669827765 is a prime.

It is a super-2 number, since 2×80669827765² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 80669827697 and 80669827706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21979045 + ... + 21982714.

It is an arithmetic number, because the mean of its divisors is an integer number (12133445760).

Almost surely, 2^80669827765 is an apocalyptic number.

It is an amenable number.

80669827765 is a deficient number, since it is larger than the sum of its proper divisors (16397738315).

80669827765 is a wasteful number, since it uses less digits than its factorization.

80669827765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43962131.

The product of its (nonzero) digits is 60963840, while the sum is 64.

The spelling of 80669827765 in words is "eighty billion, six hundred sixty-nine million, eight hundred twenty-seven thousand, seven hundred sixty-five".