2666449564 has 6 divisors (see below), whose sum is σ = 4666286744. Its totient is φ = 1333224780.

The previous prime is 2666449561. The next prime is 2666449571. The reversal of 2666449564 is 4659446662.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666449561) 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 as a sum of consecutive naturals, namely, 333306192 + ... + 333306199.

Almost surely, 2^2666449564 is an apocalyptic number.

It is an amenable number.

2666449564 is a deficient number, since it is larger than the sum of its proper divisors (1999837180).

2666449564 is a wasteful number, since it uses less digits than its factorization.

2666449564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666612395 (or 666612393 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 52.

The square root of 2666449564 is about 51637.6758191149. The cubic root of 2666449564 is about 1386.6849150345.

The spelling of 2666449564 in words is "two billion, six hundred sixty-six million, four hundred forty-nine thousand, five hundred sixty-four".