2651666289 has 4 divisors (see below), whose sum is σ = 3535555056. Its totient is φ = 1767777524.

The previous prime is 2651666287. The next prime is 2651666327. The reversal of 2651666289 is 9826661562.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2651666289 - 2¹ = 2651666287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2651666287) 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 in 3 ways as a sum of consecutive naturals, for example, 441944379 + ... + 441944384.

It is an arithmetic number, because the mean of its divisors is an integer number (883888764).

Almost surely, 2^2651666289 is an apocalyptic number.

It is an amenable number.

2651666289 is a deficient number, since it is larger than the sum of its proper divisors (883888767).

2651666289 is an equidigital number, since it uses as much as digits as its factorization.

2651666289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883888766.

The product of its digits is 1866240, while the sum is 51.

The square root of 2651666289 is about 51494.3325910726. The cubic root of 2651666289 is about 1384.1174877221.

The spelling of 2651666289 in words is "two billion, six hundred fifty-one million, six hundred sixty-six thousand, two hundred eighty-nine".