766667838 has 32 divisors (see below), whose sum is σ = 1595440800. Its totient is φ = 245307776.

The previous prime is 766667833. The next prime is 766667849. The reversal of 766667838 is 838766667.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766667833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17368 + ... + 42836.

It is an arithmetic number, because the mean of its divisors is an integer number (49857525).

Almost surely, 2^766667838 is an apocalyptic number.

766667838 is an abundant number, since it is smaller than the sum of its proper divisors (828772962).

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

766667838 is a wasteful number, since it uses less digits than its factorization.

766667838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25676.

The product of its digits is 12192768, while the sum is 57.

The square root of 766667838 is about 27688.7673615132. The cubic root of 766667838 is about 915.2415928686.

The spelling of 766667838 in words is "seven hundred sixty-six million, six hundred sixty-seven thousand, eight hundred thirty-eight".