766631051 has 2 divisors, whose sum is σ = 766631052. Its totient is φ = 766631050.

The previous prime is 766631029. The next prime is 766631081. The reversal of 766631051 is 150136667.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (150136667) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-766631051 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (766631081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383315525 + 383315526.

It is an arithmetic number, because the mean of its divisors is an integer number (383315526).

Almost surely, 2^766631051 is an apocalyptic number.

766631051 is a deficient number, since it is larger than the sum of its proper divisors (1).

766631051 is an equidigital number, since it uses as much as digits as its factorization.

766631051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 766631051 is about 27688.1030588952. The cubic root of 766631051 is about 915.2269539644.

The spelling of 766631051 in words is "seven hundred sixty-six million, six hundred thirty-one thousand, fifty-one".