68778337 has 4 divisors (see below), whose sum is σ = 69720580. Its totient is φ = 67836096.

The previous prime is 68778331. The next prime is 68778377. The reversal of 68778337 is 73387786.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18524416 + 50253921 = 4304^2 + 7089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68778337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68778331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 471012 + ... + 471157.

It is an arithmetic number, because the mean of its divisors is an integer number (17430145).

Almost surely, 2^68778337 is an apocalyptic number.

It is an amenable number.

68778337 is a deficient number, since it is larger than the sum of its proper divisors (942243).

68778337 is an equidigital number, since it uses as much as digits as its factorization.

68778337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942242.

The product of its digits is 1185408, while the sum is 49.

The square root of 68778337 is about 8293.2705852396. The cubic root of 68778337 is about 409.7169114645.

The spelling of 68778337 in words is "sixty-eight million, seven hundred seventy-eight thousand, three hundred thirty-seven".