77880556 has 24 divisors (see below), whose sum is σ = 151512704. Its totient is φ = 34784640.

The previous prime is 77880541. The next prime is 77880557. The reversal of 77880556 is 65508877.

It is not an unprimeable number, because it can be changed into a prime (77880557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22545 + ... + 25768.

Almost surely, 2^77880556 is an apocalyptic number.

It is an amenable number.

77880556 is a deficient number, since it is larger than the sum of its proper divisors (73632148).

77880556 is a wasteful number, since it uses less digits than its factorization.

77880556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48361 (or 48359 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 46.

The square root of 77880556 is about 8824.9960906507. The cubic root of 77880556 is about 427.0476612606.

The spelling of 77880556 in words is "seventy-seven million, eight hundred eighty thousand, five hundred fifty-six".