80725667779 has 8 divisors (see below), whose sum is σ = 80790688880. Its totient is φ = 80660676096.

The previous prime is 80725667719. The next prime is 80725667797. The reversal of 80725667779 is 97776652708.

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 80725667779 - 2¹⁷ = 80725536707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80725667779.

It is not an unprimeable number, because it can be changed into a prime (80725667719) 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, 10915507 + ... + 10922899.

It is an arithmetic number, because the mean of its divisors is an integer number (10098836110).

Almost surely, 2^80725667779 is an apocalyptic number.

80725667779 is a deficient number, since it is larger than the sum of its proper divisors (65021101).

80725667779 is a wasteful number, since it uses less digits than its factorization.

80725667779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14709.

The product of its (nonzero) digits is 62233920, while the sum is 64.

The spelling of 80725667779 in words is "eighty billion, seven hundred twenty-five million, six hundred sixty-seven thousand, seven hundred seventy-nine".