669334889 has 2 divisors, whose sum is σ = 669334890. Its totient is φ = 669334888.

The previous prime is 669334837. The next prime is 669334927. The reversal of 669334889 is 988433966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 638421289 + 30913600 = 25267^2 + 5560^2 .

It is a cyclic number.

It is not a de Polignac number, because 669334889 - 2¹² = 669330793 is a prime.

It is not a weakly prime, because it can be changed into another prime (669334789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334667444 + 334667445.

It is an arithmetic number, because the mean of its divisors is an integer number (334667445).

Almost surely, 2^669334889 is an apocalyptic number.

It is an amenable number.

669334889 is a deficient number, since it is larger than the sum of its proper divisors (1).

669334889 is an equidigital number, since it uses as much as digits as its factorization.

669334889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6718464, while the sum is 56.

The square root of 669334889 is about 25871.5072811771. The cubic root of 669334889 is about 874.7443667928.

The spelling of 669334889 in words is "six hundred sixty-nine million, three hundred thirty-four thousand, eight hundred eighty-nine".