669015793 has 2 divisors, whose sum is σ = 669015794. Its totient is φ = 669015792.

The previous prime is 669015791. The next prime is 669015817. The reversal of 669015793 is 397510966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 597900304 + 71115489 = 24452^2 + 8433^2 .

It is a cyclic number.

It is not a de Polignac number, because 669015793 - 2¹ = 669015791 is a prime.

Together with 669015791, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (669015791) 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, 334507896 + 334507897.

It is an arithmetic number, because the mean of its divisors is an integer number (334507897).

Almost surely, 2^669015793 is an apocalyptic number.

It is an amenable number.

669015793 is a deficient number, since it is larger than the sum of its proper divisors (1).

669015793 is an equidigital number, since it uses as much as digits as its factorization.

669015793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 306180, while the sum is 46.

The square root of 669015793 is about 25865.3396072814. The cubic root of 669015793 is about 874.6053373366.

The spelling of 669015793 in words is "six hundred sixty-nine million, fifteen thousand, seven hundred ninety-three".