7678661514 has 8 divisors (see below), whose sum is σ = 15357323040. Its totient is φ = 2559553836.

The previous prime is 7678661453. The next prime is 7678661531. The reversal of 7678661514 is 4151668767.

It is a happy number.

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

7678661514 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

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, 639888454 + ... + 639888465.

It is an arithmetic number, because the mean of its divisors is an integer number (1919665380).

Almost surely, 2^7678661514 is an apocalyptic number.

7678661514 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

7678661514 is a wasteful number, since it uses less digits than its factorization.

7678661514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279776924.

The product of its digits is 1693440, while the sum is 51.

The square root of 7678661514 is about 87627.9722120739. The cubic root of 7678661514 is about 1972.8550350852.

The spelling of 7678661514 in words is "seven billion, six hundred seventy-eight million, six hundred sixty-one thousand, five hundred fourteen".