766207860889 has 3 divisors (see below), whose sum is σ = 766208736223. Its totient is φ = 766206985556.

The previous prime is 766207860883. The next prime is 766207860893. The reversal of 766207860889 is 988068702667.

The square root of 766207860889 is 875333.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 988068702667 = 31 ⋅31873183957.

It can be written as a sum of positive squares in only one way, i.e., 9815855625 + 756392005264 = 99075^2 + 869708^2 .

It is not a de Polignac number, because 766207860889 - 2²⁷ = 766073643161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (766207860883) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 437667 + ... + 1312999.

Almost surely, 2^766207860889 is an apocalyptic number.

766207860889 is the 875333-rd square number.

766207860889 is the 437667-th centered octagonal number.

It is an amenable number.

766207860889 is a deficient number, since it is larger than the sum of its proper divisors (875334).

766207860889 is an frugal number, since it uses more digits than its factorization.

766207860889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750666 (or 875333 counting only the distinct ones).

The product of its (nonzero) digits is 97542144, while the sum is 67.

The spelling of 766207860889 in words is "seven hundred sixty-six billion, two hundred seven million, eight hundred sixty thousand, eight hundred eighty-nine".