77680225 has 24 divisors (see below), whose sum is σ = 116563968. Its totient is φ = 50131200.

The previous prime is 77680201. The next prime is 77680243. The reversal of 77680225 is 52208677.

It is not a de Polignac number, because 77680225 - 2⁹ = 77679713 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10081 + ... + 16030.

It is an arithmetic number, because the mean of its divisors is an integer number (4856832).

Almost surely, 2^77680225 is an apocalyptic number.

It is an amenable number.

77680225 is a deficient number, since it is larger than the sum of its proper divisors (38883743).

77680225 is a wasteful number, since it uses less digits than its factorization.

77680225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26145 (or 26140 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 77680225 is about 8813.6385789298. The cubic root of 77680225 is about 426.6811840628.

It can be divided in two parts, 77 and 680225, that multiplied together give a palindrome (52377325).

The spelling of 77680225 in words is "seventy-seven million, six hundred eighty thousand, two hundred twenty-five".