2666948819 has 4 divisors (see below), whose sum is σ = 2687948544. Its totient is φ = 2645949096.

The previous prime is 2666948807. The next prime is 2666948839. The reversal of 2666948819 is 9188496662.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2666948819 - 2⁴ = 2666948803 is a prime.

It is a super-2 number, since 2×2666948819² = 14225232006330989522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2666948839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10499672 + ... + 10499925.

It is an arithmetic number, because the mean of its divisors is an integer number (671987136).

Almost surely, 2^2666948819 is an apocalyptic number.

2666948819 is a deficient number, since it is larger than the sum of its proper divisors (20999725).

2666948819 is a wasteful number, since it uses less digits than its factorization.

2666948819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20999724.

The product of its digits is 8957952, while the sum is 59.

The square root of 2666948819 is about 51642.5098053919. The cubic root of 2666948819 is about 1386.7714553518.

The spelling of 2666948819 in words is "two billion, six hundred sixty-six million, nine hundred forty-eight thousand, eight hundred nineteen".