80421777 has 24 divisors (see below), whose sum is σ = 121627584. Its totient is φ = 51109344.

The previous prime is 80421743. The next prime is 80421797. The reversal of 80421777 is 77712408.

It is not a de Polignac number, because 80421777 - 2²⁰ = 79373201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80421797) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91263 + ... + 92139.

It is an arithmetic number, because the mean of its divisors is an integer number (5067816).

Almost surely, 2^80421777 is an apocalyptic number.

It is an amenable number.

80421777 is a deficient number, since it is larger than the sum of its proper divisors (41205807).

80421777 is a wasteful number, since it uses less digits than its factorization.

80421777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349 (or 1346 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 80421777 is about 8967.8189656125. The cubic root of 80421777 is about 431.6428536097.

The spelling of 80421777 in words is "eighty million, four hundred twenty-one thousand, seven hundred seventy-seven".