766662618241 has 8 divisors (see below), whose sum is σ = 874203528744. Its totient is φ = 666059831040.

The previous prime is 766662618217. The next prime is 766662618251. The reversal of 766662618241 is 142816266667.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 331067898225 + 435594720016 = 575385^2 + 659996^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 766662618241 - 2³⁵ = 732302879873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (766662618251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1734530590 + ... + 1734531031.

It is an arithmetic number, because the mean of its divisors is an integer number (109275441093).

Almost surely, 2^766662618241 is an apocalyptic number.

It is an amenable number.

766662618241 is a deficient number, since it is larger than the sum of its proper divisors (107540910503).

766662618241 is a wasteful number, since it uses less digits than its factorization.

766662618241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3469061651.

The product of its digits is 6967296, while the sum is 55.

It can be divided in two parts, 7666626 and 18241, that added together give a palindrome (7684867).

The spelling of 766662618241 in words is "seven hundred sixty-six billion, six hundred sixty-two million, six hundred eighteen thousand, two hundred forty-one".