77878063 has 4 divisors (see below), whose sum is σ = 77910840. Its totient is φ = 77845288.

The previous prime is 77878039. The next prime is 77878103. The reversal of 77878063 is 36087877.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77878063 - 2¹³ = 77869871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77878033) 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 3 ways as a sum of consecutive naturals, for example, 12520 + ... + 17677.

It is an arithmetic number, because the mean of its divisors is an integer number (19477710).

Almost surely, 2^77878063 is an apocalyptic number.

77878063 is a deficient number, since it is larger than the sum of its proper divisors (32777).

77878063 is a wasteful number, since it uses less digits than its factorization.

77878063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32776.

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 77878063 is about 8824.8548429988. The cubic root of 77878063 is about 427.0431045341.

The spelling of 77878063 in words is "seventy-seven million, eight hundred seventy-eight thousand, sixty-three".