766121457122 has 90 divisors (see below), whose sum is σ = 1426051710753. Its totient is φ = 308607867456.

The previous prime is 766121457109. The next prime is 766121457169. The reversal of 766121457122 is 221754121667.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 701173444321 + 64948012801 = 837361^2 + 254849^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=618919.

It is a Duffinian 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 44 ways as a sum of consecutive naturals, for example, 1031118683 + ... + 1031119425.

Almost surely, 2^766121457122 is an apocalyptic number.

766121457122 is a deficient number, since it is larger than the sum of its proper divisors (659930253631).

766121457122 is an frugal number, since it uses more digits than its factorization.

766121457122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550 (or 769 counting only the distinct ones).

The product of its digits is 282240, while the sum is 44.

Adding to 766121457122 its reverse (221754121667), we get a palindrome (987875578789).

The spelling of 766121457122 in words is "seven hundred sixty-six billion, one hundred twenty-one million, four hundred fifty-seven thousand, one hundred twenty-two".