766668433 has 2 divisors, whose sum is σ = 766668434. Its totient is φ = 766668432.

The previous prime is 766668401. The next prime is 766668451. The reversal of 766668433 is 334866667.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 761318464 + 5349969 = 27592^2 + 2313^2 .

It is a cyclic number.

It is not a de Polignac number, because 766668433 - 2⁵ = 766668401 is a prime.

It is not a weakly prime, because it can be changed into another prime (766662433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383334216 + 383334217.

It is an arithmetic number, because the mean of its divisors is an integer number (383334217).

Almost surely, 2^766668433 is an apocalyptic number.

It is an amenable number.

766668433 is a deficient number, since it is larger than the sum of its proper divisors (1).

766668433 is an equidigital number, since it uses as much as digits as its factorization.

766668433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 49.

The square root of 766668433 is about 27688.7781059403. The cubic root of 766668433 is about 915.2418296372.

The spelling of 766668433 in words is "seven hundred sixty-six million, six hundred sixty-eight thousand, four hundred thirty-three".