7764520680 has 224 divisors, whose sum is σ = 29935958400. Its totient is φ = 1774700928.

The previous prime is 7764520657. The next prime is 7764520691. The reversal of 7764520680 is 860254677.

7764520680 is a `hidden beast` number, since 7 + 7 + 64 + 520 + 68 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 55 ways as a sum of consecutive naturals, for example, 185101 + ... + 223139.

Almost surely, 2^7764520680 is an apocalyptic number.

7764520680 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7764520680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14967979200).

7764520680 is an abundant number, since it is smaller than the sum of its proper divisors (22171437720).

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

7764520680 is a wasteful number, since it uses less digits than its factorization.

7764520680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38075 (or 38056 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The square root of 7764520680 is about 88116.5176343232. The cubic root of 7764520680 is about 1980.1809751936.

The spelling of 7764520680 in words is "seven billion, seven hundred sixty-four million, five hundred twenty thousand, six hundred eighty".