78606077 has 12 divisors (see below), whose sum is σ = 87181500. Its totient is φ = 70815360.

The previous prime is 78606071. The next prime is 78606083. The reversal of 78606077 is 77060687.

It is an interprime number because it is at equal distance from previous prime (78606071) and next prime (78606083).

It can be written as a sum of positive squares in 2 ways, for example, as 1359556 + 77246521 = 1166^2 + 8789^2 .

It is not a de Polignac number, because 78606077 - 2¹⁸ = 78343933 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 (78606071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10799 + ... + 16547.

It is an arithmetic number, because the mean of its divisors is an integer number (7265125).

Almost surely, 2^78606077 is an apocalyptic number.

It is an amenable number.

78606077 is a deficient number, since it is larger than the sum of its proper divisors (8575423).

78606077 is a wasteful number, since it uses less digits than its factorization.

78606077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5884 (or 5873 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 41.

The square root of 78606077 is about 8866.0068238187. The cubic root of 78606077 is about 428.3696638156.

The spelling of 78606077 in words is "seventy-eight million, six hundred six thousand, seventy-seven".