7765668642 has 8 divisors (see below), whose sum is σ = 15531337296. Its totient is φ = 2588556212.

The previous prime is 7765668611. The next prime is 7765668661. The reversal of 7765668642 is 2468665677.

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

7765668642 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 647139048 + ... + 647139059.

It is an arithmetic number, because the mean of its divisors is an integer number (1941417162).

Almost surely, 2^7765668642 is an apocalyptic number.

7765668642 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.

7765668642 is a wasteful number, since it uses less digits than its factorization.

7765668642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294278112.

The product of its digits is 20321280, while the sum is 57.

The square root of 7765668642 is about 88123.0312801370. The cubic root of 7765668642 is about 1980.2785584010.

The spelling of 7765668642 in words is "seven billion, seven hundred sixty-five million, six hundred sixty-eight thousand, six hundred forty-two".