766641199 has 2 divisors, whose sum is σ = 766641200. Its totient is φ = 766641198.

The previous prime is 766641193. The next prime is 766641209. The reversal of 766641199 is 991146667.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 766641199 - 2⁵ = 766641167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (766641193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383320599 + 383320600.

It is an arithmetic number, because the mean of its divisors is an integer number (383320600).

Almost surely, 2^766641199 is an apocalyptic number.

766641199 is a deficient number, since it is larger than the sum of its proper divisors (1).

766641199 is an equidigital number, since it uses as much as digits as its factorization.

766641199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 49.

The square root of 766641199 is about 27688.2863138909. The cubic root of 766641199 is about 915.2309922747.

The spelling of 766641199 in words is "seven hundred sixty-six million, six hundred forty-one thousand, one hundred ninety-nine".