5321778667 has 2 divisors, whose sum is σ = 5321778668. Its totient is φ = 5321778666.

The previous prime is 5321778607. The next prime is 5321778677. The reversal of 5321778667 is 7668771235.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5321778667 is a prime.

It is not a weakly prime, because it can be changed into another prime (5321778607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2660889333 + 2660889334.

It is an arithmetic number, because the mean of its divisors is an integer number (2660889334).

Almost surely, 2^5321778667 is an apocalyptic number.

5321778667 is a deficient number, since it is larger than the sum of its proper divisors (1).

5321778667 is an equidigital number, since it uses as much as digits as its factorization.

5321778667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2963520, while the sum is 52.

The square root of 5321778667 is about 72950.5220474809. The cubic root of 5321778667 is about 1745.8982758386.

The spelling of 5321778667 in words is "five billion, three hundred twenty-one million, seven hundred seventy-eight thousand, six hundred sixty-seven".