77672225 has 12 divisors (see below), whose sum is σ = 97672320. Its totient is φ = 61261200.

The previous prime is 77672207. The next prime is 77672281. The reversal of 77672225 is 52227677.

It is not a de Polignac number, because 77672225 - 2⁸ = 77671969 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 11 ways as a sum of consecutive naturals, for example, 20105 + ... + 23654.

It is an arithmetic number, because the mean of its divisors is an integer number (8139360).

Almost surely, 2^77672225 is an apocalyptic number.

It is an amenable number.

77672225 is a deficient number, since it is larger than the sum of its proper divisors (20000095).

77672225 is a wasteful number, since it uses less digits than its factorization.

77672225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43840 (or 43835 counting only the distinct ones).

The product of its digits is 82320, while the sum is 38.

The square root of 77672225 is about 8813.1847251717. The cubic root of 77672225 is about 426.6665361192. Note that the first 3 decimals are identical.

The spelling of 77672225 in words is "seventy-seven million, six hundred seventy-two thousand, two hundred twenty-five".