7758670422721 has 3 divisors (see below), whose sum is σ = 7758673208161. Its totient is φ = 7758667637282.

The previous prime is 7758670422703. The next prime is 7758670422749. The reversal of 7758670422721 is 1272240768577.

The square root of 7758670422721 is 2785439.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 7758670422721 - 2⁷ = 7758670422593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7758670422761) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1392720 + ... + 4178158.

Almost surely, 2^{7758670422721} is an apocalyptic number.

7758670422721 is the 2785439-th square number.

7758670422721 is the 1392720-th centered octagonal number.

It is an amenable number.

7758670422721 is a deficient number, since it is larger than the sum of its proper divisors (2785440).

7758670422721 is an frugal number, since it uses more digits than its factorization.

7758670422721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5570878 (or 2785439 counting only the distinct ones).

The product of its (nonzero) digits is 18439680, while the sum is 58.

The spelling of 7758670422721 in words is "seven trillion, seven hundred fifty-eight billion, six hundred seventy million, four hundred twenty-two thousand, seven hundred twenty-one".