67768305 has 16 divisors (see below), whose sum is σ = 118286784. Its totient is φ = 32857280.

The previous prime is 67768303. The next prime is 67768321. The reversal of 67768305 is 50386776.

It is not a de Polignac number, because 67768305 - 2¹ = 67768303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67768303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205194 + ... + 205523.

It is an arithmetic number, because the mean of its divisors is an integer number (7392924).

Almost surely, 2^67768305 is an apocalyptic number.

It is an amenable number.

67768305 is a deficient number, since it is larger than the sum of its proper divisors (50518479).

67768305 is a wasteful number, since it uses less digits than its factorization.

67768305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410736.

The product of its (nonzero) digits is 211680, while the sum is 42.

The square root of 67768305 is about 8232.1506910406. The cubic root of 67768305 is about 407.7014046998.

The spelling of 67768305 in words is "sixty-seven million, seven hundred sixty-eight thousand, three hundred five".