766556233 has 2 divisors, whose sum is σ = 766556234. Its totient is φ = 766556232.

The previous prime is 766556209. The next prime is 766556267. The reversal of 766556233 is 332655667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 561121344 + 205434889 = 23688^2 + 14333^2 .

It is a cyclic number.

It is not a de Polignac number, because 766556233 - 2⁵ = 766556201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 766556233.

It is not a weakly prime, because it can be changed into another prime (766556533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383278116 + 383278117.

It is an arithmetic number, because the mean of its divisors is an integer number (383278117).

Almost surely, 2^766556233 is an apocalyptic number.

It is an amenable number.

766556233 is a deficient number, since it is larger than the sum of its proper divisors (1).

766556233 is an equidigital number, since it uses as much as digits as its factorization.

766556233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 43.

The square root of 766556233 is about 27686.7519402331. The cubic root of 766556233 is about 915.1971796778.

The spelling of 766556233 in words is "seven hundred sixty-six million, five hundred fifty-six thousand, two hundred thirty-three".