77678073 has 12 divisors (see below), whose sum is σ = 122401968. Its totient is φ = 47077560.

The previous prime is 77678063. The next prime is 77678089. The reversal of 77678073 is 37087677.

It is not a de Polignac number, because 77678073 - 2¹⁶ = 77612537 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77678053) 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 11 ways as a sum of consecutive naturals, for example, 392215 + ... + 392412.

It is an arithmetic number, because the mean of its divisors is an integer number (10200164).

Almost surely, 2^77678073 is an apocalyptic number.

It is an amenable number.

77678073 is a deficient number, since it is larger than the sum of its proper divisors (44723895).

77678073 is a wasteful number, since it uses less digits than its factorization.

77678073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784644 (or 784641 counting only the distinct ones).

The product of its (nonzero) digits is 345744, while the sum is 45.

The square root of 77678073 is about 8813.5164945667. The cubic root of 77678073 is about 426.6772438648.

The spelling of 77678073 in words is "seventy-seven million, six hundred seventy-eight thousand, seventy-three".