67788906 has 16 divisors (see below), whose sum is σ = 135658848. Its totient is φ = 22582800.

The previous prime is 67788881. The next prime is 67788907. The reversal of 67788906 is 60988776.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (67788907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16521 + ... + 20211.

It is an arithmetic number, because the mean of its divisors is an integer number (8478678).

Almost surely, 2^67788906 is an apocalyptic number.

67788906 is an abundant number, since it is smaller than the sum of its proper divisors (67869942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67788906 is a wasteful number, since it uses less digits than its factorization.

67788906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6757.

The product of its (nonzero) digits is 1016064, while the sum is 51.

The square root of 67788906 is about 8233.4018485678. The cubic root of 67788906 is about 407.7427131241.

The spelling of 67788906 in words is "sixty-seven million, seven hundred eighty-eight thousand, nine hundred six".