2669658989 has 2 divisors, whose sum is σ = 2669658990. Its totient is φ = 2669658988.

The previous prime is 2669658947. The next prime is 2669658991. The reversal of 2669658989 is 9898569662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2189304100 + 480354889 = 46790^2 + 21917^2 .

It is a cyclic number.

It is not a de Polignac number, because 2669658989 - 2¹² = 2669654893 is a prime.

It is a Sophie Germain prime.

Together with 2669658991, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2669658889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1334829494 + 1334829495.

It is an arithmetic number, because the mean of its divisors is an integer number (1334829495).

Almost surely, 2^2669658989 is an apocalyptic number.

It is an amenable number.

2669658989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2669658989 is an equidigital number, since it uses as much as digits as its factorization.

2669658989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100776960, while the sum is 68.

The square root of 2669658989 is about 51668.7428625857. The cubic root of 2669658989 is about 1387.2410449177.

The spelling of 2669658989 in words is "two billion, six hundred sixty-nine million, six hundred fifty-eight thousand, nine hundred eighty-nine".