68078777 has 12 divisors (see below), whose sum is σ = 74453184. Its totient is φ = 62215920.

The previous prime is 68078753. The next prime is 68078797. The reversal of 68078777 is 77787086.

It is a de Polignac number, because none of the positive numbers 2^k-68078777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68078707) 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, 15452 + ... + 19362.

It is an arithmetic number, because the mean of its divisors is an integer number (6204432).

Almost surely, 2^68078777 is an apocalyptic number.

It is an amenable number.

68078777 is a deficient number, since it is larger than the sum of its proper divisors (6374407).

68078777 is a wasteful number, since it uses less digits than its factorization.

68078777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040 (or 4027 counting only the distinct ones).

The product of its (nonzero) digits is 921984, while the sum is 50.

The square root of 68078777 is about 8250.9864258766. The cubic root of 68078777 is about 408.3230672786.

The spelling of 68078777 in words is "sixty-eight million, seventy-eight thousand, seven hundred seventy-seven".