21963966776066 has 16 divisors (see below), whose sum is σ = 37652602899456. Its totient is φ = 9413106511776.

The previous prime is 21963966776051. The next prime is 21963966776131. The reversal of 21963966776066 is 66067766936912.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21963966775984 and 21963966776002.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5282030 + ... + 8475126.

It is an arithmetic number, because the mean of its divisors is an integer number (2353287681216).

Almost surely, 2^{21963966776066} is an apocalyptic number.

21963966776066 is a deficient number, since it is larger than the sum of its proper divisors (15688636123390).

21963966776066 is a wasteful number, since it uses less digits than its factorization.

21963966776066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3684433.

The product of its (nonzero) digits is 1111065984, while the sum is 74.

The spelling of 21963966776066 in words is "twenty-one trillion, nine hundred sixty-three billion, nine hundred sixty-six million, seven hundred seventy-six thousand, sixty-six".