7666701878 has 16 divisors (see below), whose sum is σ = 12564573120. Its totient is φ = 3479569800.

The previous prime is 7666701877. The next prime is 7666701901. The reversal of 7666701878 is 8781076667.

It is a super-2 number, since 2×7666701878² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7666701877) 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, 249908 + ... + 278903.

It is an arithmetic number, because the mean of its divisors is an integer number (785285820).

Almost surely, 2^7666701878 is an apocalyptic number.

7666701878 is a deficient number, since it is larger than the sum of its proper divisors (4897871242).

7666701878 is a wasteful number, since it uses less digits than its factorization.

7666701878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529483.

The product of its (nonzero) digits is 4741632, while the sum is 56.

The square root of 7666701878 is about 87559.7046477431. The cubic root of 7666701878 is about 1971.8302519536.

The spelling of 7666701878 in words is "seven billion, six hundred sixty-six million, seven hundred one thousand, eight hundred seventy-eight".