766506628021 has 8 divisors (see below), whose sum is σ = 767441316224. Its totient is φ = 765572472000.

The previous prime is 766506628003. The next prime is 766506628049. The reversal of 766506628021 is 120826605667.

It is a happy number.

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 766506628021 - 2²⁹ = 765969757109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766506626021) 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, 2788276 + ... + 3050818.

It is an arithmetic number, because the mean of its divisors is an integer number (95930164528).

Almost surely, 2^766506628021 is an apocalyptic number.

It is an amenable number.

766506628021 is a deficient number, since it is larger than the sum of its proper divisors (934688203).

766506628021 is a wasteful number, since it uses less digits than its factorization.

766506628021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266091.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 766506628021 in words is "seven hundred sixty-six billion, five hundred six million, six hundred twenty-eight thousand, twenty-one".