2123564066 has 16 divisors (see below), whose sum is σ = 3431937600. Its totient is φ = 979659408.

The previous prime is 2123564041. The next prime is 2123564083. The reversal of 2123564066 is 6604653212.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43355 + ... + 78273.

It is an arithmetic number, because the mean of its divisors is an integer number (214496100).

Almost surely, 2^2123564066 is an apocalyptic number.

2123564066 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2123564066 is a deficient number, since it is larger than the sum of its proper divisors (1308373534).

2123564066 is a wasteful number, since it uses less digits than its factorization.

2123564066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37273.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 2123564066 is about 46082.1447634547. The cubic root of 2123564066 is about 1285.3511464964.

The spelling of 2123564066 in words is "two billion, one hundred twenty-three million, five hundred sixty-four thousand, sixty-six".