766667438 has 8 divisors (see below), whose sum is σ = 1150118760. Its totient is φ = 383294520.

The previous prime is 766667437. The next prime is 766667483. The reversal of 766667438 is 834766667.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 766667438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766667437) 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 3 ways as a sum of consecutive naturals, for example, 27128 + ... + 47636.

It is an arithmetic number, because the mean of its divisors is an integer number (143764845).

Almost surely, 2^766667438 is an apocalyptic number.

766667438 is a deficient number, since it is larger than the sum of its proper divisors (383451322).

766667438 is a wasteful number, since it uses less digits than its factorization.

766667438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39202.

The product of its digits is 6096384, while the sum is 53.

The square root of 766667438 is about 27688.7601383666. The cubic root of 766667438 is about 915.2414336963.

The spelling of 766667438 in words is "seven hundred sixty-six million, six hundred sixty-seven thousand, four hundred thirty-eight".