77678063 has 2 divisors, whose sum is σ = 77678064. Its totient is φ = 77678062.

The previous prime is 77678053. The next prime is 77678089. The reversal of 77678063 is 36087677.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77678063 - 2¹⁴ = 77661679 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77678053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38839031 + 38839032.

It is an arithmetic number, because the mean of its divisors is an integer number (38839032).

Almost surely, 2^77678063 is an apocalyptic number.

77678063 is a deficient number, since it is larger than the sum of its proper divisors (1).

77678063 is an equidigital number, since it uses as much as digits as its factorization.

77678063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 296352, while the sum is 44.

The square root of 77678063 is about 8813.5159272563. The cubic root of 77678063 is about 426.6772255552.

The spelling of 77678063 in words is "seventy-seven million, six hundred seventy-eight thousand, sixty-three".