80776877 has 8 divisors (see below), whose sum is σ = 85825656. Its totient is φ = 75761152.

The previous prime is 80776873. The next prime is 80776889. The reversal of 80776877 is 77867708.

It can be written as a sum of positive squares in 4 ways, for example, as 55636681 + 25140196 = 7459^2 + 5014^2 .

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 80776877 - 2² = 80776873 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80776873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3128 + ... + 13089.

It is an arithmetic number, because the mean of its divisors is an integer number (10728207).

Almost surely, 2^80776877 is an apocalyptic number.

It is an amenable number.

80776877 is a deficient number, since it is larger than the sum of its proper divisors (5048779).

80776877 is a wasteful number, since it uses less digits than its factorization.

80776877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16527.

The product of its (nonzero) digits is 921984, while the sum is 50.

The square root of 80776877 is about 8987.5957296710. The cubic root of 80776877 is about 432.2772229684.

The spelling of 80776877 in words is "eighty million, seven hundred seventy-six thousand, eight hundred seventy-seven".