82780677 has 32 divisors (see below), whose sum is σ = 143155200. Its totient is φ = 46291824.

The previous prime is 82780669. The next prime is 82780679. The reversal of 82780677 is 77608728.

It is not a de Polignac number, because 82780677 - 2³ = 82780669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82780679) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4224 + ... + 13542.

It is an arithmetic number, because the mean of its divisors is an integer number (4473600).

Almost surely, 2^82780677 is an apocalyptic number.

It is an amenable number.

82780677 is a deficient number, since it is larger than the sum of its proper divisors (60374523).

82780677 is a wasteful number, since it uses less digits than its factorization.

82780677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9382 (or 9376 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 45.

The square root of 82780677 is about 9098.3887035013. The cubic root of 82780677 is about 435.8225103811.

The spelling of 82780677 in words is "eighty-two million, seven hundred eighty thousand, six hundred seventy-seven".