7766326656 has 192 divisors, whose sum is σ = 25284168000. Its totient is φ = 2353328640.

The previous prime is 7766326649. The next prime is 7766326661. The reversal of 7766326656 is 6566236677.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×7766326656² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent 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 23 ways as a sum of consecutive naturals, for example, 330795 + ... + 353493.

It is an arithmetic number, because the mean of its divisors is an integer number (131688375).

Almost surely, 2^7766326656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7766326656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12642084000).

7766326656 is an abundant number, since it is smaller than the sum of its proper divisors (17517841344).

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

7766326656 is a wasteful number, since it uses less digits than its factorization.

7766326656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22739 (or 22715 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 54.

The square root of 7766326656 is about 88126.7646972246. The cubic root of 7766326656 is about 1980.3344889449.

The spelling of 7766326656 in words is "seven billion, seven hundred sixty-six million, three hundred twenty-six thousand, six hundred fifty-six".