7668978855 has 8 divisors (see below), whose sum is σ = 12270366192. Its totient is φ = 4090122048.

The previous prime is 7668978847. The next prime is 7668978859. The reversal of 7668978855 is 5588798667.

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

It is not a de Polignac number, because 7668978855 - 2³ = 7668978847 is a prime.

It is a super-2 number, since 2×7668978855² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7668978855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7668978859) 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 7 ways as a sum of consecutive naturals, for example, 255632614 + ... + 255632643.

It is an arithmetic number, because the mean of its divisors is an integer number (1533795774).

Almost surely, 2^7668978855 is an apocalyptic number.

7668978855 is a deficient number, since it is larger than the sum of its proper divisors (4601387337).

7668978855 is a wasteful number, since it uses less digits than its factorization.

7668978855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511265265.

The product of its digits is 203212800, while the sum is 69.

The square root of 7668978855 is about 87572.7061075539. The cubic root of 7668978855 is about 1972.0254409580.

The spelling of 7668978855 in words is "seven billion, six hundred sixty-eight million, nine hundred seventy-eight thousand, eight hundred fifty-five".