80777087 has 4 divisors (see below), whose sum is σ = 80797680. Its totient is φ = 80756496.

The previous prime is 80777069. The next prime is 80777107. The reversal of 80777087 is 78077708.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80777087 - 2⁸ = 80776831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80777057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2387 + ... + 12932.

It is an arithmetic number, because the mean of its divisors is an integer number (20199420).

Almost surely, 2^80777087 is an apocalyptic number.

80777087 is a deficient number, since it is larger than the sum of its proper divisors (20593).

80777087 is a wasteful number, since it uses less digits than its factorization.

80777087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20592.

The product of its (nonzero) digits is 153664, while the sum is 44.

The square root of 80777087 is about 8987.6074124319. The cubic root of 80777087 is about 432.2775975729.

The spelling of 80777087 in words is "eighty million, seven hundred seventy-seven thousand, eighty-seven".