766988188722 has 162 divisors, whose sum is σ = 1989277890327. Its totient is φ = 212949269568.

The previous prime is 766988188717. The next prime is 766988188723. The reversal of 766988188722 is 227881889667.

It can be written as a sum of positive squares in 5 ways, for example, as 679076531721 + 87911657001 = 824061^2 + 296499^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=619269.

It is not an unprimeable number, because it can be changed into a prime (766988188723) by changing a digit.

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 80 ways as a sum of consecutive naturals, for example, 962343628 + ... + 962344424.

Almost surely, 2^766988188722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 766988188722

766988188722 is an abundant number, since it is smaller than the sum of its proper divisors (1222289701605).

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

766988188722 is an equidigital number, since it uses as much as digits as its factorization.

766988188722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690 (or 846 counting only the distinct ones).

The product of its digits is 260112384, while the sum is 72.

Multiplying 766988188722 by its sum of digits (72), we get a square (55223149587984 = 7431228²).

The spelling of 766988188722 in words is "seven hundred sixty-six billion, nine hundred eighty-eight million, one hundred eighty-eight thousand, seven hundred twenty-two".