21314626066 has 4 divisors (see below), whose sum is σ = 31971939102. Its totient is φ = 10657313032.

The previous prime is 21314625971. The next prime is 21314626093. The reversal of 21314626066 is 66062641312.

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

It can be written as a sum of positive squares in only one way, i.e., 12660975441 + 8653650625 = 112521^2 + 93025^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5328656515 + ... + 5328656518.

Almost surely, 2^21314626066 is an apocalyptic number.

21314626066 is a deficient number, since it is larger than the sum of its proper divisors (10657313036).

21314626066 is a wasteful number, since it uses less digits than its factorization.

21314626066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10657313035.

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 21314626066 in words is "twenty-one billion, three hundred fourteen million, six hundred twenty-six thousand, sixty-six".