766554091 has 2 divisors, whose sum is σ = 766554092. Its totient is φ = 766554090.

The previous prime is 766554079. The next prime is 766554167. The reversal of 766554091 is 190455667.

It is a weak prime.

It is an emirp because it is prime and its reverse (190455667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 766554091 - 2⁵ = 766554059 is a prime.

It is not a weakly prime, because it can be changed into another prime (766854091) by changing a digit.

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 as a sum of consecutive naturals, namely, 383277045 + 383277046.

It is an arithmetic number, because the mean of its divisors is an integer number (383277046).

Almost surely, 2^766554091 is an apocalyptic number.

766554091 is a deficient number, since it is larger than the sum of its proper divisors (1).

766554091 is an equidigital number, since it uses as much as digits as its factorization.

766554091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 766554091 is about 27686.7132574453. The cubic root of 766554091 is about 915.1963272271.

The spelling of 766554091 in words is "seven hundred sixty-six million, five hundred fifty-four thousand, ninety-one".